You will be hard-pressed to buy them anywhere outside of eBay or a flea market. The latter is actually decent sometimes, as you can negotiate the price and don't pay shipping. Here are the ones I have (not for sale, sorry):
Blue with white stripes
Dark blue with white stripes
Black with silver stripes (have a few of these to match my 1:1)
Silver with blue stripes
Solid red
Lime green with black stripes
Red, white and blue (basically three large stripes)
I think that is all of them. At least I hope so!
Chris
PS. Your chances of finding them in stores now are slim to none - they have been out a couple years...