Window screen clips broke. Where can i find these?

Well, it's been aw while, but I contacted Keystone and they referred me to El Mountain RV. They sent me the wrong thing, but are still looking for it (I think).
I did finally realize the rear LR window, although bigger, has the same screen and clips, and I can now see their actual shape before broken, and how they're installed. The bottom is just slid into the frame interior into permanent clips. I'll try to repost the pics if I can. Thanks, Barney, for the pic info.