I've just been onto the Autobulbs website again and noticed that they do a 21W 9LED replacement (I tried the 21W 19LED). Whether they would be the same diameter or slightly smaller I don't know, so I am contacting them to check out the ABD 7440 in Amber; I will also ask about output as, although there are fewer LED's, they may be larger and give off overall the same bightness.
