The two screwdriver method usually works as a Plan B.
Here's an eBay listing for a front caliper seal and ss piston kit:
http://tinyurl.com/Pantera-Caliper-Kit
John
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.