No one is gonna sell just the pins by them selves unless the arms they come from happen to be bent/damaged or otherwise un-sellable. So unless your prepared to buy another set of complete arms. Then buying your way out of it isnt a solution.

But, If you did want to buy a set of arms with good pins. I just happen to have a set of GD alloy arms forsale.

Edit. Also have some FXT LCA joints. Which have nearly identicle geometry to the ALK style joints.

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Doing it for all the wagons out there