Here's the the weblink in case you don't have it.
http://www.panterasbywilkinson.com/
I've seen a wide range of prices for glass amongst the vendors, so it probably pays to shop around.
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.