You might want to check out the Retina Wallpapers HD app. It's got a TON of wallpapers, and you can superimpose a glowing "shelf" graphic over any of them and then save the output to your camera roll. There are about 20 different color-choices for the shelves.
Here's a quick example:
(There are other things you can superimpose as well, like little squares for each app so it looks like they are recessed on your springboard, etc).