You can get the whole set for a full replica from Meadspeed, pipes from Swarbrick- both in the UK. It's not cheap though.
Aerotech do a body kit all in fiberglass if your in the US. 3M can help with engineering and engine parts if you want to go all the way.
I picked up all my bits on ebay - the tanks not a very good fit and will be replaced at some point. With all the parts I removed and sold off on ebay It's only cost me about £200, plus the F1 donor bike, so far.