I have found what I believe to be a replacement.
DH2173, the mast it goes to is 0.25 inches shorter but the same width, the holes are off but I guess I will just drill some new holes.
My boat has a wooden beam coated in fiberglass that runs atop the cab so it should be fairly simple.
This company sells pins as well, right now I am just using a bolt.
Does anyone know of any other company that sells hardware that I might find a closer match on the holes?