I've heard some talk about Fairchild Seals on the 1st Generation Diesel Forums. Maybe you can contact them for more information. Maybe Detroit Muscle Technologies (DMT) which is a sponsor here might have something that would work for you? The other issue is I'm assuming you're using aftermarket glass. I've read that some aftermarket glass for the trucks don't play well with the compatibility of Precision Seals.
Contacted Fairchild, they don't carry them.
Contacted Detroit Muscle, theirs are made by the same manufacturer.
