How did the bracket just break? You could take off your lift and go to a different dealership who'd help you out, but unless you actually did something, probably offroad, to stress it enough to break, then it probably wore out over time due to the different angles of the lift.
I got the original Rancho/OME/Skyjacker/Daystar Frankenlift over a year and half ago and since then I've been slowly replacing OEM components in the front end. IFS seems much more weak than SFA, so replacing some of the questionable stock suspension/steering parts is the only way I feel safe driving my Jeep. Taking your modded Jeep to a dealership is asking to get ripped-off or your warranty denied. When my upper ball joint failed on one of the OEM upper a-arms, taking it to the dealership for repair was the last thing on my mind. Buying what you need and repairing your Jeep yourself, possibly with a friend or two, is going to save you insane amounts of money and the headaches you'll get from trying to get the dealership to co-operate. If the vehicle is lifted, they can try to void the suspension and steering parts of your bumper-to-bumper warranty, and your entire powertrain warranty, especially if you have bigger tires. I've had a dealership service rep tell me that they won't cover 'insert repair' under warranty because lifting a Liberty at all will put undue stress on the driveshafts, front control arms, ball joints, front swaybar, CV shafts and joints, the whole rack and pinion. Truely, it's not so bad that you should expect everything to fail, but expect to replace everything at least once, I say!

_________________
2003 Limited, Silver - L.O.S.T. # 068957 Rockies
http://www.cardomain.com/ride/2127390/14
2006 Kawasaki KLR650