Yes, I have a perfect donor car,..rotted floors, one of the rear frame rails is gone, rotted trunk pan,..there's even rot in the door jamb areas. Plus, the tail panel is caved a bit. Yeah, to fix all that would cost way more than the cost of the Dynacorn reproduction body.
But once you get past the rot, my donor car has 95% of its parts,..full interior, convertible hardware, dash parts, body parts, engine bay parts, brakes, glass & hardware almost everything, and oddly, almost none of the parts have any rust issues.
The VIN issue is not an issue, at least for me. I've before, had to replace parts on which the VIN tag was attached. Once on a 71 Camaro, I had to replace the whole cowl panel and once on a 73 Vette (the A-piller post). The correct rivets are out there for this purpose. Also, think of the thousands of fully licensed reproduction 32 Fords and other kit cars.