For many years Fred Cornell sold these through Buffalo Arms. A year ago he sold his business to the machinist who had been making them for him, and that man is now supplying Buffalo Arms.
He does not (yet) make a .500" punch suitable for the .500 S&W. I just got off the phone with the man and he said he'd make this new size for $75 if we had a minimum of 25 orders.
Any interest?
JR