Ring to adapt 675 Z-A battery to replace PX13

Years back I found a guy making a neat little ring to allow use of the 675 Zinc-Air battery in place of the outlawed PX13. Had the chance to buy 2 but wanted to be sure it worked. I bought one. It works great. Would like to get another so both SRT 101s can be working simultaneously. Have no idea where I got this but remember it was a citizen making them one at a time by hand.

Does anyone have this connection still? The ring looks like a split washer but flat & appears to be brass.