The latest on rudder shoes. Talked to the tool maker who is going to build a mold to manual specifications for me and either pour it himself or arrange to have it poured, depending on whether I use manganese or silicon bronze. He has easy access to one (silicone) but not the other but does know an area foundry that pours a lot of manganese that will do it for me, if I choose manganese. (probably)
The bad news is that he isn't interested in setting up to do a production run, although he might be persuaded at a later date if there is sufficient demand to make it worth his while. Multiple use molds are considerably more involved and he just wants to a small project to keep him out of the rain. What I can do is make a plaster mold(s) of the new rudder shoe when it arrives and send those to whoever wants one so they can take it to their local foundry or I could possibly arrange to have castings made from the plaster molds at the same place mine gets done.