Or try Radio Shack (although it can be overpriced as well). The best best, if you have one: an electronics store in the area. I just picked up a 3’ or so USB micro-cable for $1 (but it was on sale) a few weeks ago.
Oops, almost forgot a great source for things like this: meritline.com (great for items like this!) and monoprice.com.
http://www.meritline.com/1-foot-usb-a-to-micro-usb-m-m-data-cable-for-cell-phones—p-59661.aspx - only $1.99 shipped, but comes from China–takes 2-3 weeks to arrive.
