Where to buy academy sb hop ups?

[jerrywasaracecardriver]

I have recently bought another academy sb sport. This time I paid roughly half of retail, and so am now willing to spend more on it to bring it up to competition spec. Problem is, I have no idea where to order parts from. The lhs is out of the question, as they have too high of a mark up for low quantity. Anybody know what mail order houses, preferably inside the uSA, but any will do, actually carries academy replacement and hop ups? Im also looking for an aftermarket motor mount. Any ideas as to who makes one? Thanks!