I am looking for plastic trim inserts that go in aluminum extrusion trim. I am working on the galley and bath in a 77 overlander. Readily available RV trim insert sold as 1 inch really isn't. It's to narrow to fit the Airstream trim extrusion. I have looked at the links provided in this forum but can't find what I am looking for. Here's a couple of pix of what I am looking for. Thanks for any help.