Moral of that story - go with smaller windows? <G>
Vintage Technologies is about 100 mile round trip from here, so I stopped by their shop so they could have a peek at what I had to work with, then went with their recommendations. They also marked the panels to show where to put them for the guy who did the install. Side windows are 21x14 (VT #WD07) , and rear doors are 16x14 (VT #WD03). You also have to match the trim rings to the body - TC used "0" thickness rings designed for thin panels like mine.
Anyway - I figured most anything would be better than no windows at all, but was pleasantly surprised by how much visibility improved, both side and back, especially after gutting the cargo wall. I've also got a backup camera, but prefer to actually see what's behind me when driving. The smaller rear windows are a good fit for the back doors I think.
PS - careful with sliders - you'll want to make sure the drain holes are pointing either down or back, or you could get some water inside. Mine are right and tight ...
No complaints here, which is kind of a bummer as I really like to complain. ;-}