It's interesting to see that virtually all the wear is in the hole, not much, if any on the cross. Why not make bronze bushings to replace the worn pieces? Any good machinist with a lathe, a press, and the right size chucking reamer should be able to do that.

"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!