Try browsing Ebay for a new, or good condition used pin. The first thing to do is remove the pin and do some measuring with a micrometer- - - -NOT a dial or digital caliper. More than a few thousandths wear where it rides in the carrier is problematic. Once the pin starts hammering itself back and forth as the drive wheels encounter rough road surfaces, potholes, etc., the hardened pin will wear the softer metal of the carrier pretty quickly. Also measure the holes in the carrier for oval wear with a spring loaded expanding hole gauge.
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!