I saw this truck on FB today and it has what I have been looking for: non-opening windshields.
What are these? "Stock" or fab'd?
I've got a glass guy if anyone knows if it's just a seal or if it's a completely different frame.
You could buy yourself a piece of sheetmetal to replace the hinged windows. Full width and across the center support. Then seal with silicon or something similar to guarantee no water. The sheetmetal fabricator could cut the window holes for you. Or if you are hard core enough with a jig saw and a metal cutting blade, you cut the window holes with
about an inch an a half of space all the way around for the rubber seal. TrimLoc is a brand name.
Any car/truck window cutter could cut Safety Glass for you. Best plan would be for you to take the sheetmetal to the glass company to cut the RIGHT SIZE piece of glass... Who knows. They might even be willing to install the glass in the metal before you install the sheetmetal.
Rounded like the sample will keep you from breaking the glass... A piece of quarter inch rope will install the seal. The locking tab is installed with a tool and that firms up the window (gasket) seal.
Search Trim Lok window installation on YouTube to see how it is done.
Same as the back window on a pickup truck.