This is a case for the TP-Link TL-WR703N which is being used by many hacking projects around.
The router already comes with a compact case, but quite difficult to pry open.
I modelled this case a few months ago to allow for easy hacking with a friction fit lid that can be popped off to get access to the serial ports and other components. It was mainly an exercise in getting the measurements right for future custom cases [uploading those tomorrow].
Case/Thing is in two pieces, should be relatively straight forward to print.
There is provision for two M2x4 mounting screws but they should not be necessary as the router PCB should sit fairly snug within the case.
Insert the router PCB with the Ethernet end first through the Ethernet hole in the case and then gently push down the other end of the PCB. Secure with option M2x4 self tapping screws if required.
Removal is a bit tricky, I suggest you use angled tweezers at the mounting holes to pull the PCB out gently.