[Ian McColgin]

Don't know where my brain was hiding yesterday - the fitting is a cranse iron. It would be easy to make a wooden model to take to your local foundry for bronze. It would also be fairly easy to make in iron (not steel) which properly painted is quite wonderful on boats.

One might have a shoulder for the cranse iron to land on for smooth looks but you should rely on the tapered fit for the strength it takes to resist the pull of four stays. Also, the inside corner of that shoulder is, like a capped end, a possible place for rot, though a well greased leather pad will mitigate that.

G'luck

Ian