So I've recently been poking around reading about various suspension components and got to measuring the stance on my jeep. After realizing my passenger rear is sagging 1" below the drivers side I got curious and started looking into shocks and springs. That's when I realized that I can't find any rear coil springs for the KK.

Now, yes, I've found lifted springs by OME and JBA etc. but where are the stock height springs? I can find Mopar and Moog stock sized springs for the JK but nothing for the KK. I thought maybe the springs for the JK are the same for the KK but read somewhere that they're different. Is this true?

Asking out of curiosity. Perhaps I've just missed something but I can't believe I can find a stock replacement for every other component except for the actual spring itself.

Did you ever find a place to purchase replacement OEM rear coil springs? I am looking for a set too.

I found a bunch of part #s but I don't know which is the correct one.

16 SPRING, Rear Coil

PART #
52125553AA 1 J, T, U 74 [SDA+ZCV,ZRV]
52125554AA 1 J, T, U 74 [SDA+ZCW,ZRW]
52125551AA 1 J, T, U 74 [SDA+ZCT,ZRT]
52125552AA 1 J, T, U 74 [SDA+ZCU,ZRU]
52125555AA 1 J, T, U 74 [SDA+ZCX,ZRX]
52125556AA 1 J, T, U 74 [SDA+ZCY,ZRY]
68034671AA 1 J, T, U 74 [SDM+ZCT,ZRT]
68034672AA 1 J, T, U 74 [SDM+ZCU,ZRU]
68034673AA 1 J, T, U 74 [SDM+ZCV,ZRV]
68034674AA 1 J, T, U 74 [SDM+ZCW,ZRW]
68034675AA 1 J, T, U 74 [SDM+ZCX,ZRX]

To know which ones you need, you need to know the [sales codes] for your build.
SDA = Normal Duty Suspension
SDM = Export Tuned Suspension
+ ZCV = Spring - Left Rear, Or ZRV = Spring - Right Rear
+ ZCW = Spring - Left Rear, Or ZRW = Spring - Right Rear
+ ZCT = Spring - Left Rear, Or ZRT = Spring - Right Rear
+ ZCU =Spring - Left Rear, Or ZRU = Spring - Right Rear
+ ZCX = Spring - Left Rear, Or ZRX = Spring - Right Rear
+ ZCY = Spring - Left Rear, Or ZRY = Spring - Right Rear

As you can see each spring can be used in either location.
For proper ride height you need to know which one to use where, for your particular build.
IE;
ZCV = My Left Rear, But ZRU = My Right Rear.
Do not assume your build is the same as mine...

Not all OEM springs are created equal, in length, or rate, or both. Which is why a lot of folks that lift with = rear springs, find one corner that sits just a hair lower than the other side.

If you go to a dealer with your VIN, mileage, and prof of ownership, they can print out an "Options Report"(build sheet) for your rig. Some may charge a small fee for this...
One last thing. The Options Report may have an extra letter by the code. So in my case ZRUP is really ZRU and ZCVP is really ZCV. Not sure why they do this.
Hope this sheds a little light on things.

Thanks, is there any other place to find the sales code besides the dealer?

Can't argue with an OEM tag.
Check the rubber spring isolators also, top and bottom of each spring. if they are deteriorating, replace those also while you have it apart. If you want the rear a tad higher, stack 1 extra isolator on top of each spring(3 per spring, 2-top & 1-bottom). You'll gain the thickness of the isolator, less compression of the rubber.

Alternately you could just ad the isolators now, adding that height. Then wait for the spring to sag more before replacing them. In your Pics, it doesn't look like the springs are totally stacked (compacted to the point of one coil loop hitting the loop next to it. ) yet.

Iso's look ok from what I can see
My question is why are you looking for stock springs
Much better ride and handling with aftermarket up graded springs

Took it to a local shop to their input. They did a test drive. Said that I might not need springs/struts just yet (60k on the jeep)

However it bounces over bumps/pot holes. Body roll when taking turns. Dips when braking hard... Clunking / knocking / thump noise over speed bumps or steep pot holes.

What else should I look at that might be making those sounds? Control arm bushings? Sway bar bushings?

60,000 miles you are ready for new springs and shocks , all Libertys came from the factory with weak springs
My suggestion, I know you said no lift, BUT OME 926 and rear 730 springs would only lift it about 1.25-1.5 inches,
926 front springs are rated at 350 lb compared to the 310 stock. Much better ride and handling overall, trust me
By 60-70,000 miles I have seen Libertys sagged as much as an inch
Body rolls, dips when braking etc are worn out springs and shocks
Choose either OME or Bilstein shocks and you'll love driving it

side note: I bought my 04 brand new, hadn't driven it 5000 miles before I was looking at new suspension, stock was junk over bumps/ RR tracks, turns etc, replaced whole suspension before it had 20,000 miles on it and was never happier.
My 03 even before I bought it, knew I was buying another Liberty, already had the JBA coilovers lift kit before I even found one that I wanted.

Bummer too late, I already bought the front monroes and rear monroe struts, the only thing I did not buy are the rear coil springs.

Mainly because when I search part # 52125553AA / 52125553AB it comes up as discontinued part "Manufacturer's Notes This part is discontinued. It is no longer available for purchase." and that is what I need for my passenger side rear.

The weird thing is when I search 52125554AA, it comes up for about $64 bucks and thats what I need for my drivers side rear. But what do I replace the passenger side rear with if the part is discontinued ?