OK, I’ll go out on a limb … I couldn't quite tell, but it looks like the yellow car has a large chrome ring centered on the front grill. Without researching body lines, it immediately made me think “Studebaker” (and then “Tucker”).
Agreed, the other models should be easy to find — especially the white VW, as this thread recently showed .
Gotta love those doodlebugs; have fun with this project!
Tomlinson Run Railroad