Yes, that is the car.
Yes, we already found that and yes that is her Uncle's ebay ad. We have also found the post on the Pantera forums from the person that purchased the car stating that he just won it on ebay, car number 4004 from Columbus, OH. All you had to type in was 1972 pantera VIN 4004, because her uncle did not post the entire VIN in the ad, although we do have the entire VIN and cannot find anything recently. As I am sure you found it, it took about 5 minutes to find.
He is no longer a member, but he uses the same s/n on ebay, so I sent him a message after looking at his feedback from around the time the car was sold. He has NOT sent me anything back as of yet.
We do know that the car/plates are still registered here in Ohio.
Thanks for the help though guys, who knows you may see something we missed when searching!