Big shout out to 3dYeti for the design. This is a straight Remix of their design to add a hole for the adapter cable and work with my late 2012 Nexus 7. http://www.thingiverse.com/thing:43980

The build fits the late 2012 model very snug. I push the Nexus on from the side to attach it on. Not over the extruding volume buttons.

2012 Nexus 7 measures 7.8 X 4.7 X 0.41 inches and is 12 ounces.

Enjoy!

Pick some ABS plastic in the colour you like.

The print is in 2 parts like 3dYeti's with yellow 1.75mm ABS plastic.
My ReplicatorG settings:
Object infill %: 30
Layer Height (mm): 0.27
Number of shells: 1
Feedrate (mm/s): 40
Travel Feedrate: 55
Print temperature: 220

My ReplicatorG Plastic:
Filament Diameter (mm): 1.82

My ReplicatorG Extruder:
Nozzle Diameter (mm): 0.4

Print took 3 hours and 28 minutes.
2012 Nexus 7 measures 7.8 X 4.7 X 0.41 inches and is 12 ounces

You will see once it's printed there are 4 sections to snap off. It took some force to do so. You may need to file down and clean up any leftovers if you are unable to snap it off cleanly.