Here is a link to a thread on upgrading seats Upgrading Pantera Seats. Mark posted some pics of a Sparco seat in his car. The pics are about half way down page three.
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.