I didn't like all of the designs because I was losing printing area, then I designed this one for my RepRapDiscount Full Graphic Smart Controller with this case: http://www.thingiverse.com/thing:213852
Benefit: -You will lose less printing area than others. (if you have a tall extruder)
It fits on top of Prusa I3 Aluminum frame(6mm of thickness x 40mm tall)
You can download the .IPT(Autodesk Inventor) and edit as you wish.
**UPDATE 1 (09/18/2015): -Fixed to fit better on frame.
**UPDATE 2 (09/18/2015): -Fixed "Suporte Esquerda.stl" to fit the SD card when LCD is on the mount.
If you made one, please comment and click in "I Made One" to share a photo.
I printed in ABS with 40% infill, honeycomb. I'm not sure, but i think it's ok to print in PLA.