Wanted: F2 Pin Which Goes in Car of Adjustable Mast Track

I'm trying to find a replacement stainless steel pin to fit an F2
adjustable mast track car.  It's the pin which screws into the bottom
of the universal joint then goes into the top of the track car.
Specifically I need the one for an F2 Phoenix 340 but I would think
that most F2's would share the same pin. Thanks. Bob T.