This is a simple stand for Wii U.
Created in less than 30 minutes with a scanner, Inkscape and Sketchup.
So far I have not printed the stand or tested on my Wii U.
The most important dimensions were checked.

This part is not sold separately from Nintendo!

Update: 07.01.2013
New version. Foam rubber can be used now as the original. WiiUstand v2

Someone has already printed?
Update:
Pnit has printed it and it fits!
The status "Work in Progress" was removed.