Paul,
You're missing a number in the VIN, should be 13 numbers, not 12.
Probably the only way to track the present owner by VIN is by a law enforcement officer to do a query, however, these queries are logged and will generally lead to disciplinary charges for access not related to a law enforcement purpose.
You could try contacting this registry and maybe they could put you in touch with the new owner if the car has been registered:
https://www.1968z28.com/document.html