Depends on early or late (non air cleaner hump vs air cleaner hump) They are around on evil-bay. I paid around $250 for a cover with the air cleaner hump
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.