It's always a 10 cent part, like a pin, that fails in an expensive product and that the manufacturer doesn't sell. :-(
I think a lot of things like this are just considered "supplies" by a manufacturer, that it buys in bulk, and not a part.
When you get this sorted out, please post how you solved the pin issue, as I think many folks would be interested. I can't image how one would fabricate a pin.
Perhaps a stainless steel nail, inserted so that the head of the nail is on the inside of the rods, with the protruding end that comes out of the connection being cut short and peened with a hammer, so it is like a rivet, or threaded using a die, so that a tiny nut can be screwed on the outside and secured with lock-tight red.
But of course, I have been accused of being Rube Goldberg. :-)
Mannyrock