Looking for lost cars

[89 MJ]

I recently decided to try to track down my dad's 70 GTO that he had in high school and the beginning of college. I've posted it with Lost Muscle Cars on FB, reached out to a couple of Instagram pages, posted it on the local Craigslist, and have posted it on a few Pontiac forums. We've gotten one lead on a form that can be filled out and sent into the state to get a record of every vehicle my dad owned, including the VIN, so that should help find it. We aren't too optimistic because the car has been missing for 32 years and supposedly went to the town that my parents have lived in for nearly 25 years

 

Any other suggestions?

 

Here is the info I have posted for the car as of now:
 

Originally a 455 HO, TH400, 12 bolt posi with 4.10 gears. Sold with a non original Pontiac 400 in it. 
Color was Palisade Green with a green interior. The car had bucket seats and a center console. The car underwent a restoration in 1991. The quarter panels were replaced with GM NOS pieces. Like most late production GM quarters, the right side quarter panel did not fit the bumper opening well. The hood was repaired from a kink on the left side. Rust was just starting in the frame behind the right front wheel. 
It had power steering, power disc brakes, and 15” Rally II wheels from a Firebird. It also had factory AC and a tach dash. Being a 455 HO car, it also had rear boxed lower control arms and a rear sway bar. 

The car was sold in 1993 to a person who was a Pontiac collector and was said to live in Holmen, WI, but no such person has been found to this point.

[Comanche SS]

Have heard of others hiring private investigators, apparently they have some tools and expertise regular civilians don’t…

[89 MJ]

26 minutes ago, Comanche SS said:

Have heard of others hiring private investigators, apparently they have some tools and expertise regular civilians don’t…

That’s good to know. I’ll keep that in mind.