Try Singapore Hobbies first. They sell Hirobo Lama parts which are probably identical.

http://www.singahobby.com/hir06.html

This place sells the "Housefly" which, as far as i can tell is a clone too.

http://www.wholesaletrains.com/Airpl...e&Item=mtc9501

Otherwise try here. Probably the most expensive.

http://www.raidentech.com/xrotationrchel.html

I'd try to fix it if I were you but you have to be a handy guy.

Cheers
Warren