There's a '72 Trans-Am on eBay right now that was Tucker-Plaza car new...auction notes orig. sales documents are there and I wondered if the seller or new buyer may give info or copies that may help w/ leads to find old dealer sales people names/contacts etc?.
http://cgi.ebay.ca/Pontiac-Trans-Am-TRAN...7QQcmdZViewItem
Also I think there's still a Plaza Pontiac in Toronto Canada too?. Not correct but maybe a plate frame from there would be close or better than nothing?.
~ Pete