How rare are 273 Commando factory pistons .030 over ?

Miranthis said
Just bought new Egge 0.030 over 273 Commando pistons for my build. I think there were a couple other places with them available, but Egge had them in stock and they get so much publicity here I went with them.

My machinist had heard of Egge but had never used them. He was impressed with the quality and the size and weight consistency.