Sorry but unfortunately the bushings are part of the lower control arm and CANNOT be purchased seperately..
Sway bar bushings are a known weak link in our Calibers. I just had to replace mine.I have read that a few ppl are getting front end noise while going over speed bumps and such. I had a slight cluck in the front end of my cali and took it in. After about an hour in the customer lounge the service tech told me that stabilizer link bushings were prematurely worn (defective). Not sure if this is the same for anybody ealses cali but thought it might help.