Pete,
Check with RigRite--
They have a lot of New Old Stock Pearson Spars parts like this. If you don't see it on the website, you might call them up as I have found they have more misc. than is listed.

Alternatively, you can have a machine shop duplicate the original parts. My Triton has nasty cast aluminum everything which is old and pitted...in which I have little faith. I am having a fellow in the technology department at the local U. duplicate all of the parts from billet stock, which shuold be much stronger. I'm going to be sure that a Delrin bushing goes between the stainless parts (like your "eye") and the rest of the assembly, as well. Cost--especially on things like the spreader sockets--is markedly less than buying the stock cast-aluminum items.
Dave