The best parts website that I think we all recommend is
www.ronayers.com. The exhaust system for this bike, however, if like $600 new. It's kinda absurd.
There is a member on here who is currently parting out his whole bike and has been pretty active in looking for takers. I'll send you a link in your "WTB" thread. You can PM him and I'm sure you guys can work something out.