Check ebay for a window, new listings all the time so you'll have to keep looking. Google trailer salvage places, one that I know of is Fletcher's, they are in NY, you should be able to find them online. I put a newer Scamp
side window in our Uhaul
by making an aluminum adapter plate. Also look under " teardrop trailer" on eBay, there are usually windows
listed there. As I was told by my local glass place, camper windows are supposed to have tempered glass in them, one window in our teardrop does not.