Me and my girlfriend just finished this project. She rigged it, and I modeled/textured it. You are free to use this model and rig for any non-commercial use as long as you credit us. The download is available here http://www.creativecrash.com/maya/downloads/character-rigs/c/wilhelm-the-giraffe Video of the rig in action…
The rig was updated with some bugs and tweaks if anybody needs to redownload it. Check out this awesome animation my friend Taylor Hodgson-Scott did with the rig. Sorry I just noticed you posted this now. I did not find any detailed pictures of any giraffe anatomy besides the ones we shared back and forth.