Unfortunately it didn't come on mine either...I have searched several different places for wallpaper, and don't remember ever running across this particular one. Best advice is to just keep searching...unless someone else out there knows where to get it.
For those of you who like this, I have submitted something similar to CB wallpaper images. Keep checking back under Wallpaper, Babes, and Stomach...hopefully they will post it.
Keep your fingers crossed!!