Try searching on here, google, ebay. Other question I'd be asking - would a new bulb look the same as the old one on the other side (as in, produce the same light), or do some people replace both to get a perfect match? :S
go on hids-direct and get a new pair for £35 bargain an get 6000k
infact i didnt read it properley
what do you mean it stopped working, just literally was on one minute off the next?
has it been going a pin ky colour, has it been flickering?
ok first things first you need to swap your xenon bulbs around to see if its the bulb.
if you swap them round and the same headlight doesnt work then its the ballast or the igniter
but more likeley the ballast if the bulb that wasnt working still doesnt work in the other light then its a new bulb you need
simples