Forget the ends.. old printer cables are awesome for stealing separately color coded individual wires. No need to pay radio shack boat loads of money for their 4 or so colors. Most printer cables have all the color combinations, striped, etc.. makes locating a bad wire in a mess of wires really easy.
Note: only use the inside wires for data (e.g. inputs) and not power (e.g. +5/+12 volts or of course 120 volts), as they're quite small.