Here are some sites and places I got alot of my rb stuff from:
www.jgycustoms.com (checkout there kick-ass rb flywheels)
www.frsport.com
www.phase2motortrend.com
www.gspeedcorp.com (they have the cleanest rb clips around)
All the places mentioned had great customer service and would gladly do buisness with again. Hope this helps and good luck.