On the backside of the bell housing, there is a “cup” that accepts the starter shaft as it engages the flywheel. Is this “cup” available as a separate part? Mine has been worn through closest to the ground (likely from too many unpaved roads). Both Bob Drake and the Ford Barners agree that it is not a part (with a number), so I'm guessing that I need to connect with someone who has one as a spare or an idea how to get one. Please PM me if you can help. Thanks.