The Tamiya body is the
MP4/13 body set from the F103RM. I have 2 of the same New In Package at home in bags on the shelf. The body is a lot wider at the rear than either the SP body or the F104 Pro body. It was meant to cover a transverse stick pack battery! It is also shorter!
Yes someone has painted this color scheme. The big thing to avoid to make the huge top cuts on the body are motor tabs. Get a motor with end bell lugs like the Speedpassion or Hobbywing motors if you can. That alone will lower the body 5 or 6mm.