i've never messed with d.i.y. stuff myself, but i would imagine that slipping some matching techflex (or whatever brand you can find) sleeving would be pretty simple and cheap. and just leave the ends raw, rather than heat-shrinking them down so you can just slip the techflex off if you ever do want to sell the cables.
they probably wouldn't have it at any hardware store, but online parts stores are chocca with it...
they probably wouldn't have it at any hardware store, but online parts stores are chocca with it...