That looks very repairable.
You will need to remove the windshield and find someone who specializes in trim repair. I have seen much worse than this brought back to "as new" condition.
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.