I had to replace several panes on my recently installed vinyl windows and have had real grief trying find the little exterior trim that seal the outside. It kind of snaps into a groove on the window frame then is suspose to secure window from popping out. The local window and glass shops either don't stock it for outside sales or just won't sell to a diyer. This also includes the shop that ordered in the replacement panes. If there isn't any source can I use clear exterior silicone calking all the way around and be done with it to hold the pane securely. Oh, and I did use that double sticky tape stuff on the inside but had to silicone the exterior to secure the window in the middle of a snowstorm last winter. I don't know the brand of window, it was geniric from the big box store. bjr23