The file 'ATX Dangerous Prototypes Power Supply Base 3D Printer Model' is (sldprt,STL) file type, size is 103.5KB.
Base for Dangerous Prototypes ATX power supply break out board.
Breakout board: http://www.seeedstudio.com/atx-breakout-board-bench-power-supply-p-1222.html?cPath=155
There are other suppliers too.
I used M3 screws
base.sldprt | 202.5KB | |
baseAssem1.STL | 66.3KB |