Ron,
Try Trevor Legate's book:
p66 XGT-1 Car No 8 and also on p185. You can see the Exoto model on the link below.
http://www02.exoto.com/Collectibles/...G19047-FLP.asp
However, I believe the car was dismantled after 1966 and restored by H&M. So maybe they might have some pictures?
Brett