Daryl,
On the quarter panel of Charlie's Challenger it reads:
Competition & Sports Cars Ltd
Greenwich, Conn.
I did a Google search and came up with the following address:
Name:Competition & Sports Cars Ltd
Address:355 W Putnam Ave
City:Greenwich
Zip:6830
State:CT
Phone:(203) 661-1725
Fax:(203) 869-2707
Maybe someone there knows something. It's worth a shot.
Pete