[jere]

Interesting links. The first is for American factories only, which is neat, but I'd be surprised if this case was made in America. I'm familiar with the second link, but I don't believe it's related to factories/mass production. The third link is being squatted on.

[thruflo]

Ah yes sorry, meant fabhub.io. Ironic to get the address wrong as its my site. Belated disclaimer.

For outsourcing, alibaba.com and mfg.com are the big ones. Starting onshore / digital may be good for short run & prototyping. Trade mags and manufacturer associations have local directories.