Where can I buy 1/2" colored elastic by the yard?

I am working on projects that require several yards of 1/2" (or close to that width) elastic in red, pink, lt. & dk. blue, and lavender. Needs to be fairly tough (not that soft wimpy too-stretchy stuff!) I am not having much luck finding it online and no luck locally. I'd like to buy it all from one place in one order (I have found shops that carry 1 or 2 of the colors, but not all colors at the same place) Can anyone help me out?