I see the available slot cars, mentioned above, are 1/32. We all know REAL slots are 1/24 scale.
If you follow my 914 Ferrari build, you'd see I just mentioned my buddy, Martin, restores 1/24 scale slot cars. He also makes any needed replacement parts, including things like tires. Yes, it's ridiculous. And awesome.
Two days ago, I send him a 1/24 scale set of 914 dimensions and scaled pics. He's now in the process of carving a wooden buck as the first step in making the mold to create 914 bodies - narrow and GT.
If these turn out the way virtually all his work does, these may be offered for sale. I'll update you as things progress.