Hey guys, I have one of these. It fits on any TT01 Tamiya chassis or a 1/10 scale RC chassis. A link to the MR2 body is here:
ABC Toyota MR2 MR 2 body fit Tamiya TT01 HPI - (eBay item 160151937118 end time Sep-07-07 01:02:40 PDT)
They come with optional parts as well as decals for the tailights,etc. The body is clear polycarbonate and you paint it from the inside. Mine has an upgraded motor,battery,aluminum drive axle,etc. It will do 50 mph and is four wheel drive. I have yet to finish the body but should have it done this weekend and can post pics. The pain is cutting it out.