[vel0city]

A lot of System76 laptops are essentially rebadged versions of Chinese or Taiwanese ODMs. You might have some luck trying to research what model the ODM produces the laptop as and find replacement batteries for that instead of focusing on finding System76 branded batteries.

Hope you find your batteries.

[fullstop]

Yes, I went down the clevo path as well. No dice, it does not exist.

I found a few which said "in stock" but was refunded each time as the part didn't actually exist.