Welcome to TN Ryan.
1) Umm... as for parts you can try the TN sponsors here.. ie
www.toyotaparts4u.com
people here often go to tirerack.com or another online tire shope for thinks suspension related. there's ebay, and finally...... there'e the junk-yard
don't forget the Camry Stickies...LOTS of links for oem and performance parts.
2) need replacements (How are you going over bumps?)
3)are you saying adding power accesory to your car or fixing?... either way, you might just want to hit up the junkard for these parts...(can get the whole assymbly for cheap)