ᐅ Looking for affordable surface-mounted electrical boxes/switches

Hello, I am looking for a good and affordable manufacturer of surface-mounted boxes and switches.
Do you also have a reliable source?

Thank you.

Do you mean those gray ones with a flap at the front for garages and similar? They are made by Kopp and can be found in every hardware store across the country.....

I don’t necessarily need moisture-proof dampers. The basement is dry.

Does anyone else have other suggestions or possibly even sources?

Berker offers a nice surface-mounted range in glossy white, based on their S 1 series. Available through any electrician or online.

Just a quick, basic question on this...

Currently, each of my basement rooms has one recessed outlet and one switch installed. As far as I know, there are no recessed junction boxes in the rooms.

I would now like to install additional boxes in the corners of the rooms. These will need to be surface-mounted since I also have to run them along concrete exterior walls, and boxes will need to be attached there as well. How would you suggest connecting to the existing recessed wiring so that I can continue with a surface-mounted installation?

My idea was to put a surface-mounted box onto the existing recessed boxes.