Weld up the worn spot with "hard facing" arc welding rod, or "air hardening" drill rod and an acetylene torch, then grind the contour back to the correct shape. Either one will provide a wear-resistant bearing surface.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!