tifosi_ms1: Atomic Z Cars are distributed for Atomic Toys in San Diego, Ca.
Hopefully, TinyRC will be getting all the mod kits for it.
If you live in California or Nevada, HobbyShack(People) carry all the mods... The 2.6 and 3.0 motors (come with the gears), bodies (comes with "adaptor" to fit BitCharG bodies), tires, and 100 mah NiMh batteries (comes with a decal set). The parts are all interchangable with bits with the exception of the bodies. Z Cars will accept the Bit CharG bodies with the adaptor, but the Z Car bodies will not fit on the Bits (too small).
Here's a size comparison:
