I bought amber XP80 LED bulbs from DiodeDynamics, which came with an amber-colored base that made the reflector look... amber. So I plasti-dipped the base grey, and now the bulb and lens looks completely clear.
The XP80s are worth it, IMHO. Plus they allow you to do fun stuff if you buy a TapTurn:
http://www.seriesblueadventures.com/...-relay-upgrade