Need help on headlight bulbs

One of my HID Xenon bulbs has blown on my UK classic shape Impreza turbo and i carn't find any replacements in the UK, i would like to change the complete kit on both lights what size is the headlight fitting ie, H1 H4? and can anyone recommend anywhere locally for them?

Thanx in advance

Alan

 

Just put some ordinary h4 ,s in till you get a set of hid,s simples

 

I have found out the HID kit on my car are specials i needed to source from Japan, taken kit out this afternoon and fitted good quality H4 bulbs for the moment, until i can find a good HID kit at a good price.

Thanx