Well I'm starting to have a pretty nice collection of TGP memorabilia. I have an original TGP add "A Toast To Your Hotrod Heart," two Revell 1990 Turbo Grand Prix models, the November 1988 issue of Car&Driver doing a review about the prototype, and I just won a May 1989 issue of Automobile featuring the TGP and a Ford Thunderbird Super Coupe on the cover.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2241&item=3501715839&rd=1
All I need now is the HotRod issue that features a TGP and the TGP poster that Jeff is trying to get. :D