BTW I see lots of Air punch sets out there. Even 18". my concern is their diameter. I have lots of these in my Box at work but use them for rivets. We definitely don't source our Rivet tools from Snap On.

This is a used/new tool store in Wichita guys at work mentioned. Not sure if they ship.

https://www.yardstore.com/riveting/r...-straight-used


I found this through google shopping, and this is just one of the cheaper vendors.
https://www.coastaltoolsupply.com/pr...gaAr8eEALw_wcB

I like this tapered point, available from many sellers. This allows you to put all your weight into it since it will self center in the end of the axle stub.
https://www.ebay.com/i/322324150858?chn=ps&dispItem=1