First question is does your MOBO support SATA. As for cables you can check your local Best Buy, Circuit City they may have them but by no mean certain.If you have a CompUSA there is probably a good chance they have them.This
is an example of the type of cable you need they come in longer and shorter lengths and differant brand names.
As you can see by the link New Egg does carry them but you will pay more for the shipping than you will the cable so I would only order from them if I had a larger ticket item to purchase also. Zip ZoomFly says they have free shipping but I notice their price is more then it would cost to get from newegg even with shipping added.