It's still a bit of a work in progress, but I'm just about done with a swing-up "window" proof-of-concept. I did this first one using a 4-door hardtop panel, and I used a solid panel rather than tinted plexiglass because I've got the solid material on hand and it will prove the concept, a plexiglass proof-of-concept would be next. I don't have enough of the correct weatherstrip on hand yet, so I've just short pieces of it at key points to get the dimensions right. The 2-door hardtop behind the test panel is just a handy place to lean the panel against for the photos...
So far so good, although I'd like to find slightly better hinges than these, and these keyed latches are just what I have on hand, not necessarily what I'd like to use for a more final version. Also a small gas strut to hold it in the open position would be a better idea than my long arm.
This concept requires no modification to the hardtop except for drilling holes for the hinges. The factory window could be glued back in place in the future if the swing-up window was removed.
The photos below show the proof-of-concepts of the quick release windows, so if you could imagine the solid panel swing-up done in tinted plexiglass with the hinges and latches you'll get an idea what a swing-up in plexiglass might look like.