Where to find empty 1 and 2 gang project boxes.

Hi, new to the area (Arduino development). I'm trying to find empty project boxes that mount inside gang boxes, essentially something like an empty switch/outlet enclosure but one that has a solid face plate that I can modify to my needs, install Motion sensor, display and so forth. Does anybody have any leads on something like this?

Thanks ahead of time for any leads.

Try your local electrical wholesale companies (most will sell to anyone) - the companies that sell industrial stuff - they should have some nice tough boxes - last one I got was about 8x8 inches 4 inches or so deep - they should be able to give you the mfg names if you want to look at the web sites for the correct size

Use search term 'electrical enclosures'.