Just looking at the NPD catalog, they list Carlite and Ford logoed glass as official Carlit glass , not a generic with a Carlite stamp. Looks like they don't have logoed glass for the fastback though.
A quick "buyer-be-ware". When I had my car stripped and repainted, the old original glass was very pitted, so I allowed my paint guy to order a new windshield. It took 7 (yes seven) windshield before they got one that actually fitted. Chinese junk!! If it were not for the trouble and time to go to NPD, I would have bought US made glass. I still may, kinda wish I had.
So apparently Carlite glass is available, but maybe not for the fastback if one wants the Carlite stamp.