Bronze distributor shaft gear wear
Luckily I was able to find a Crane melonized gear myself, but yes now they are unobtainable. I’ve read on various sites of people carefully radiusing the edges of the teeth on the cam as a means to help prevent the shaving of the bronze.
Could maybe source and send a new steel gear (once removed from the shaft) off to be melonized (or a bunch, keep a couple for future, sell the rest) that might be an option? An answer is out there just might mean $$$