marui BIG BEAR

[gixxer]

I am thinkin about buying a big bear it has a knackered gearbox, are parts still available for these I have been looking but drawn a blank and thought some of the knowlegeable chaps on here might know?
I only want it for bashing around with my boy who has a lunchbox
If memory serves me right the gearboxes are a bit weak on them anyway? If anyone can shed some light on the above I'll be very gtatefull

Cheers john