Easy Dell DA-2 D220P-01 Clamp

Bulky, but easy to print. No support needed. Also, 15% infill is more than enough!

I'm using two clamps to mount my Power Supply "upside down" under my workbench. The second picture shows a little gap between clamp PSU, this is intended so you don't have to remove the PSU's rubber feets.

You can be sure these clamps have a snug fit, so your PSU won't move a bit!