maybe a a/c cover? know how they have the covers for the gauges? i think they sell white ones for a/c... i've seen them before on ebay, but i'm not sure who makes them...
to do it with led's you're probably gonna have to remove parts of the dash to get into it... or you could cut the wires (if you can find them) that power the lights, and install your own back there. just don't cut the power to the switch.