A few years ago, was going to buy a car from a longtime friend, vin fell off years ago.
At the time, found a company that reproduces vins, specific makes/models/years.
Appeared to be legit, legal, needed documentation, proof of ownership, manufacturer's consent for the designs, etc.
Quick search today, found plenty of places that ask no questions.
Has to be a way, some states relented and now allow the r&r of a vin for restoration.
Would hate to have to get a replacement vin, that can't be fun.
The reality is no one has ever checked the actual vin on my junk. Dmv only asks for ppwk, inspection only scans registration in window, no one even knew the vin was in the door jamb.