I don't have one, but I might be able to help. You can easily scatch build a window by using clear acetate. Well stocked hobby shops or plastic supply shops will have it. If you need the glass to be flush with the outside surface, you can cut a piece of 040" styrene to fit in the opening. You can then vacuform a sheet of acetate over the plastic. The clear glass can then be glued from the inside of the body. Hope this helps.