Did you check the various registries for info?
http://www.detomasoregistry.org/
http://www.qv500.com/detomasoregistry.php
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.