Yeah I don't know what I was thinking as I have the same ones. Duh. You are looking for the Jackson WA-60 Unigoogle with the ratcheting headgear correct? Those have been out of production for quite a while now. I found mine on Ebay several years ago.
I did find these links:
https://kpaulindustrial.com/jackson-...s-3002689.html
https://www.fastenal.com/products/details/0854743
https://www.hanessupply.com/jackson-safety-15988
Jackson's gone to sh** since Kimberley-Clark bought them out.
Maybe Kent can direct you to an alternative source or run cheater lenses in a conventional pair like the WR-60 in place of your glasses.