Drivers Door molded rubber seal holder

For a 1972 Duster, this piece is about 3-4" wide and long, in a very irregular shape; is made of light gauge metal and covered w/rubber. It fits at the bottom of the Door glass and screws into the door jamb w/3 screws. It forms the seal for the window and clamps the door rubber seal molding under it as well.

OR- I am game for making something that will work- ANY IDEAS ON WHAT I COULD USE?
OK, now I have the correct name. I need a used drivers side DOOR SEAL for my 72 Duster.