Trying to locate 1968 Mustang

Hello. I’m trying to locate a 1968 Mustang my father owned when he lived in NW Indiana and Ashland, Kentucky. He sold it in Ashland, Kentucky probably around 1980. It is a turquoise coupe with the 289 engine and three speed automatic transmission. We believe the VIN may be one of the following:
8R01C127151

8R01C154165

8T01C155968

8T01C225480

Any ideas on how I would be able to search and locate this vehicle?
Thank you