I have created a frame for a double glazed window for a cabinet i built for my printer.

The frame is made for 2 acrylic glas panes measuring 475 x 516 x 3mm. The border pieces can be scaled to your window size. The frame is designed to snap into a piece of wood with a 15mm thickness. You can glue the window into the frame which is not necessary. The frame is to be inserted from the front into the wood cutout and the covers can be snapped on from the back