This is a power supply box for a 12v 5A PSU. I will be using this to power LED strips on my 3D Printer. The back features a cutout for 120/240v IEC320 C14 power cable inlet(computer cable). Also a power switch is integrated. The front features 6 DC Power Jacks. The top features ventilation slots.
The bottom has 2 holes for mounting this exact PSU with m3 x 5mm screws. I don't know if it will work on other PSUs from other vendors. The fit is tight though. It could pretty much just sit in there by friction. Another option would be double sided tape or hot glue along the top edge. The back panel snaps in place when I printed it. Some light sanding, scraping might be needed to make it fit just right. If it's too loose, you can hot glue it so it's not permanent.
In the future, I may incorporate a magnet securing system for the back panel. Designed in Fusion 360. I've attached the design file in case you want to tinker with it. It's probably sloppy as I'm new to 360 and modeling in general, but meh. The power inlet is offset simply cause I'm lazy. Originally I had the DC jacks on the same side as the power inlet, but I wanted room for expansion. So, I moved them to the front so I could have 6 instead of 4. I didn't feel like re-sketching and modeling the back, so I left it offset.
Power Supply - https://goo.gl/ro6uT8
IEC320 Power Input - https://goo.gl/JKEiHR
DC Power Jacks - https://goo.gl/jh1C30
DC Power Plug - https://goo.gl/FzvrqG