I think the pins used to hold them in place are just roll pins that you can get at any Ace Hardware.
I was able to find the pins at Ace Hardware. They have them in with a bunch of other smaller items in pull out drawers located in the specialty fastener area . Be careful driving them back in place. I mi!%@$ one of mine before not paying enough attention and broke a piece off one of my bottle gates.
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That sucked