I have read the various threads on anti-walk pins. I have pins that walk in both a Colt Match Target HBAR lower and a post ban Match Target Competition HBAR lower.

Does anyone know where to get anti-walk pins for the non mil spec Colt post ban hammer & trigger? Do they even make them?

WHY?  

It sounds like you tweaked the hammer spring, and the problem is the spring, not the pin.  

Note: When you tweak the hammer spring, bend it at the coil, not down the leg.  If you bend the spring down the leg, it will not sit in the hammer C-cut channel/pin grove, which allows the pin to walk due to lack of engagement in the pin grove, or the trigger C-cut on the side of the trigger pushes the spring up/out as you pull the trigger.


Also, it is normal for the hammer pin to spin.  The j-sping (center of hammer) holds the pin tight to the hammer, and the pin will spin with the hammer.  The hammer spring holds the trigger spring, so this pin should stay stationary, with maybe a tinny bit of movement.