Original parts fit best

Not always a well known item on the 69 and 70 Mustangs, but the door cups on the door panel have a screw that holds the panel to a metal bracket.  Ford engineers designed a rubber insert that would be installed to cover the screw and make the area look more finished.  Very hard to find originals especially in white and most people do not understand these came with all cars (that had a deluxe interior).  A cool detailing item.