T-stat is Robertshaw (Flowkooler) #333-180.
I think that Marlin Jack has made some of the restrictor plates. Try contacting him. I've never replaced one of these plates, but it appears to be doable in the car.
John
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.