Here's a case I made for the Adafruit 7" HDMI 800x480 Display with Touchscreen.
The screen module isn't totally symmetrical, thus this case isn't either. The case design does a nice job of protecting the module while permitting easy access to the touchscreen as well as the power and display ports.
I needed something I could use to throw in a backpack for portable, "just in case" use of the module.
Enjoy!