Alternative way of keeping the LBP (locking block pin, small pin) from walking would be a friction fit. Kinda like a nail in wood. Many nails have perpendicular ribs on the body near the head, similarly burrs can be created on the pin at the points of contact to the frame using a mechanics type diagonal cutter. Just use enough hand force on the tool to create burrs not cut the pin. Obviously do not use a flush cutting precision wire cutting Swiss diagonal tool for this task, it will ruin the tool.
I am assuming the plastic walls at the pins are solid not hollow for the above method to work. Something like the trigger guard of the Glock might be different, I think its hollow based on the sound it makes when tapped.
The friction based fit of the pin will require installation by tapping with a metal mallet and punch not push install. The mallet has more of an impact affect unlike a push, less likely to damage the pin.