Be sure and discuss your needs with the US vendors. I'm sure they'll work with you on pricing and shipping considering your circumstances.
Kirk Evans comes to mind when it comes to body parts. For everything else, Dennis Quella (Pantera Performance Center ) and PIM (the sponsor of this BB board) come to mind.
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.