I can get hold of a full conversion kit at 8000k for £50.00 delivered, Also Bi-Zenon for full conversion with high and low beam in H4 fit for £80 delivered, They come in a brief case style box for if/when you ever need or want to remove them too lol.
Can get H7 kit too but its bit more expensive, not even sure what type of bulb my head lamps are as i had non GTI ones before, I can get these super cheap to me through my supplier so i might consider a conversion soon, just cant make my mind up at the moment.