I as well removed my quarter windows long ago. As for the rear window, you could have tempered safety glass cut and make a frame for it similar to the way the GT40 rear glass is sandwiched in a 2-sided frame. Perhaps a think formed bulkhead with a flange on it the glass sits in?
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.