Those clamps were likely made in a race shop- not a difficult chore. Contact Les Gray in CA <tipo874A@msn.com, or Guy Trigaux in N Carolina <GTD2860@gmail.com> They both own real GR-4/GT-4 racers and may have spares. Good luck, Kristian.
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.