hold off a bit before you buy any gears, i might have just found a source for a rebuild kit that includes 4 gears, buttons and some other odds and ends.
i'm not sure they are still available but i have an email into the guy who had them. the pricing seemed pretty reasonable circa 2004. if he still has them it might have changed, since i don't know what it will be for sure(or if he still has some) i'm gong to hold off on that info...no point in putting up possibly bad information.
i need one of these as well, so lets hope he has at least to kits left.
-chris-