Maybe someone who is undertaking a Group 4 conversion would have the cut out pieces available? Your car doesn't look to have too aggressive a flare, so Group 4 cutout pieces should be sufficient.
Julian
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.