I have replaced my pitted vent window frames, weatherstrips, seals & handles with repops from NPD. While I was changing over the parts I noted there were rubber pads/gaskets on the lower front edge which would sit on top of the upper front edge of the door. These have a single screw fastening them to the bottom of the frame. I don't see these in the NPD catalogue. To be clear, I'm not referring to the "outer vent window seal" which runs the length of the lower edge. Any ideas on where to look for these? Thanks!