I was looking for an enclosure/holder for a voltmeter and temperature display, but couldn't find anything existing that was what I was looking for. I built these to screw onto the side of my printer enclosure (Stuva cabinet from IKEA).

To install, just snap the display into the enclosure and screw the enclosure onto whatever surface you'd like. I drilled a hole to run the wires through and then installed the display, so the hole is hidden.

The displays I purchased and used were:

Voltmeter: http://www.dx.com/p/203339
Temperature: http://www.dx.com/p/417909

They are identically sized, obviously.