Are you sure it's HID's you've got? Do they have balasts in the wiring as HID's are the best upgrade for lighting available normally
Thats a strange one, the kits normally come with bulbs. Phillips or Bosch do replacment HID bulbs though.
Don't know the model sorry. I just seen them on eBay so check there?
For the price it's normally just as cheap to buy a new hid kit than buying just hte bulbs.
Glanza's use H4 bulbs dont they...