“The first rub rail end caps were made from a solid piece of starboard. The piece was 3/8” thick and a large square. The whole thing was hand fit.
What Todd gave you is all that is currently available. It’s made on our CNC router machine. The curved shapes match that of the rub rail molding. The straight part has to be brought down so the curved end touches the curves of the molding and insert. The ends are purposefully taller than what’s needed so the installer can custom fit them to eliminate any gaps. At least with the new end caps you only have to fit the edge that goes against the hull (half the work). Send me an email (link is below) with what you need now.