I did find these guys. http://traditionalmarine.com/marine-hardware/bolts-catches-and-closures/

Amazing how much specialization there is out there for bronze stuff.

Also found "tiller cap and strap;" up until now, I had no idea of the proper term for those parts.
http://www.robinhoodmarinecenter.com/spartan-marine/tiller-strapcap/ Mine works... but it is worn and a bit sloppy... and can be annoying while in light breezes while close maneuvering.