http://www.amazon.com/2955-Torque-Wrench-0-60-Inch-Pounds/dp/B00004SQ3B/ref=pd_cp_hi_0_imgKD Tool's makes the one I mentioned
any IN/LBS beam <--- that's the operative word, you're looking for a beam torque wrench
rotational pinion torque should be between 15-20in/lbs, and in/lbs is seldom used, beam deflection is very predictable, doesn't have to be reset or calibrated other than recentering the needle with your thumb to zero it if it gets off center or w/e - tend to be cheaper, which is what you're looking for in terms of this tool since you're going to use it prior to the R&R and during the nut reinstall to check rotational torque then it will probably land in the back corner of the tool box and not get used again until one of your friends is like..
HAY....
My DRIVESHARFT IS LEAKIN!!?!? 
just make sure you have the adapters to get a 1/4 up to 1/2 either from 1/4 to 1/2 or 1/4 to 3/8 and 3/8 to 1/2 since the 1 1/8th socket will be 1/2" drive
i have a 1/2" drive 0-100 in/lbs beam but, pretty sure it was in my snap-on box so i'm sure it was 100-150 bucks which is ludicrous unless you use it often
not a bunch of sense in getting a SUPER DUPER accurate one.. we don't care if it's "accurate" as long as it's "consistent" so go forth and find a cheap in/lbs beam torque wrench amazon or ebay's probably the cheapest.. a bicycle or motorcycle shop may very well carry one local or a hobby lobby or hobby shop of sorts that does RC car stuff