some of the suspension bushings are a royal PITA to change. They are bonded in there and need to be pressed out by someone who does that sort of thing. Some of those suspension pieces would be almost impossible for a Do it yourself'er to push out, and then press the new bushing in..........
check out
www.pdm-racing.com
they sell some suspension pieces with poly bushings already installed in them, good bet for a DIY'er...and they arent that expensive. Bad thing is its just still a stock piece of suspension.
If you want to go all out Id check out some parts from
www.splparts.com
they sell some good pieces there that replace the actual control arm or what not with a new harder piece for more performance and racing, more expensive and harder riding though. But they look pimp hehe.