UPDATE:
I finally got together with my machinist friend and completed the machining on a bronze bushing to insert into the worn hole in the gear. It turned out that the hole that was badly worn in the gear was not straight, but had a slight internal taper. So when I inserted the bushing it went through the gear about halfway. Using a press to push it the rest of the way worked perfectly. The bushing is now firmly inserted into the gear.
The axle pin that the gear spins on was a bit rough from the embedded bronze on the surface. I chucked it into my lathe and polished it with a piece of fine machinist paper until it was smooth. Measurements show that it is uniform over it's length within 0.0005".
So upon arrival at my boat I will re-install the gear and pin with a proper amount of winch grease. And with yearly grease service I expect that this winch will operate nicely for many more years.
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