Where can I find a good skin to protect my iPod?

So I have one of those 20gb iPods with color display (formerly known as the iPod photo) and I want to make sure I protect it. I bought a ToughSkin from Speck products, and it works very well, but because of the price, I can't buy so many of those. I have a frost white skin, but I always wanted a green or black one. Any suggestions (and preferrably with some kind of screen protection)?