Racing emblems for the road

Hi, I’m just planning for the future, because I’m planning to make a real racing emblem for the road, the question now is, which car do I take as the basis for this project. I have a few criteria that are important to me, but in the framework of which I couldn’t find anything, maybe you know cars that meet my criteria, would please me. 1. Should be affordable, i.e. in used and drivingable form for no more than 7000 euro 2. I don’t want to have any S Elbst bearing body made of steel, i.e. either self-supporting from aluminium or lattice tube frame. (the point makes the search the hardest…) 3. as far as possible rear drive (front drive would be under conditions but also acceptable) 4. The car should be as Spartan as possible, so no airbag, air conditioning, electric window lifter etc. you know what I am looking for my 5th hard roof.