One method of bending glass is putting it on a plaster form in a furnace and heating to the point of softening the glass, letting gravity form it, known as slumping. One could rig up a temporary oven to do it.
Plexiglas can be formed by hanging it in an oven until flexible, then wrapping it over a form. For what I presume is a simple curve, an easy way to make a form is to saw wood boards to the desired curve and tack sheet metal over them. The metal is then covered with felt to avoid "markoff" on the plex. To make only a few pieces, just have enough helpers to hold the plex horizontal from all sides and lay it on the form, gently pulling the edges down, but not stretching it. Once I participated in a club built airplane where we taped sheet metal in place of the windshield and formed the plex over that. We heated it in a makeshift wood oven that was only a few inches deep, with the height and width a little larger than the plex. We clipped the plex in it with so called binder clips like you use on papers at the top and let it hang. The door was just a plywood sheet with nails stuck in holes around it, no hinges, and we just moved it out of the way, picked up the plex and wrapped it. We got it wrong the first time, so we hung it in the oven until it straightened out and got it right. Plexiglas has a memory, so reheating it let it return to the original flat sheet. You should have a larger sheet than the final size and trim it to size after bending, eliminating irregularities from holding it.
Bill
