Heater control pins -help
No real chamfer, just knock the edge off.
This probably could have been reversed engineered from the mechanisms, the slots would give you the pin diameter, measure between the plates, add some tolerances machine and test.
Mine from about 1990, I'm pretty sure the guy that made mine just used 1/2 rod, I did have one good one to work from. I did put some grease in this before it went in the car. This moves so smooth you would think the cables are not connected.
Alan