Yeah, first thing to do is go to the parts crossover page,
http://www.gasgasrider.org/html/parts_crossover.html
There are lots of other things that will work also, just do a search. Your best bet is the classifieds on here, lots of stuff to be had very reasonable (usually).
One great thing about GG parts is a lot of times they will list the size on gofasters so you can find a universal replacement for things like bearings.