Join Biinny's discord, he sells steel bowls periodically in his shop and is in the process of working on full on modules.

It's a first come first serve basis for the bowls they usually only get restocked in batches of 30 and the sellout fast.

https://www.twitch.tv/biinny

You can join his discord from there. And he posts announcements in the Brewstix channel about stock.