I went to Port Townsend Foundry, who makes some of the most beautiful bronze stuff you will ever see.
http://www.porttownsendfoundry.com/hawse.htmWhile Pete (owner) said he could make me one based on my current design, he said he had some in stock that he could adapt for much less. So he took me back through several machine shops, furnace area, etc. and back in shipping he had one that was being prepped to ship out. It looked slightly different, but close enough that with my modifications, I don't think anyone will know the difference. These are made FAR more solid than what we have! They are about 1/8 in small in each of the critical dimensions (outer part of hawse pipe), but the flange itself was slightly larger than ours. The horns are about 1 1/2 in. longer so he is trimming mine back to match the others on my boat. Also, he makes these to fit through bulwarks in various thicknesses up to 14 inches. Mine is 3 1/2 inches thick, so he will make it 3 9/16 flange to flange and I will do the final grinding for a snug fit..
He was supposed to email me a photo of these so I could post it, but you really need to see how well made these are. The construction is similar to the rear hawse cleats in that the hawse pipe portion goes halfway through on each half. The through bolts are positioned differently as well (12, 3, 6, and 9 o'clock) so I will need to drill new holes.
Total cost? $358.00 US.
BTW, he said the shrinkage on silicon bronze is about 3/32 per foot.