Your local bike shop should be able to sell it to you from bulk stock for about $1.50/foot. That's the easiest way to purchase it, as any shop should have it around in bulk and the pricing should be similar at each shop. Unless you want higher end Gore or Yokuzuna cable or something else of the like, that's the easiest way to go. Generally the bulk cable is the standard Jagwire cable, which does the job just fine, especially if you're changing cables out as often as you really should be.

http://www.thethirdhand.com/


All you need in all the colors available.