65 Barracuda, Commando V8 4 Speed

Ok! I've have my VIN (serial) number for my previously owned 65 Barracuda, Commando V8, four speed. Where is the best place to start a search to see if it still exists or what happened to it? I traded it in (in a moment of stupidity) for a new truck in Ft. Walton Beach, FL in 1975.
Norm