What's the original bulb in the puddle light?
Matt will have one to suit.
If you really want an led in the sidelight I'd get Cree LEDs, although they are over a tenner a pair.
I, and many others have just used the MTEC sidelight and headlight bulbs...
MTEC SUPER WHITE 501 W5W XENON EFFECT BULBS SIDELIGHTS
http://bit.ly/P2qCXK