the little bulb meaning the parking lights/city lights...or rather the lights that come on when you turn your light switch up one click?
if so...they sell LED lights that fit in that plug that are like 4 led's together...PIAA makes some i know...i'm not really sure exactly what you're looking for...
if you just want some colored parking lights like the one in my profile pics then you can get those for $3...but if you want LED's it will cost you $20... and if that isn't what you're talking about then sorry...lol
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