Yeah, you could start with an 03f, they aint that complex but they are rare. Tamiya discontinued them already, you might be lucky and find one in a shop but its prob E-Bay for you mate.

Parts aint much of a problem, theres a good few companies sellin spares, hop-ups and alloy parts for them, I took mine from a standard tub to it's current spec this year, they are just like any other chassis regarding esc's and motors.

The only thing you will need to change are the Tamiya drift tires and the crappy plastic shocks that come with the kit, other than that its just the best drifter out there, there is a whole load more info on the 03f on other RC Drifting websites which I am not allowed to link to.

Heres a quick pic of mine a couple months back and one how it is now,