They are H4H bulbs, just have to order then. available though many sites online. I just looked at th link, i'll warn you now that the headlights are most likely going to get stuck in customs. at least mine did when they were shipped in from out of the country through FedEx. You have to fill out a DOT approval form. If you have to do this and have questions let me know.
For the H4H bulbs PasswordJDM has them and a brand named Luminics makes them also that a few palces sell that brand. Also Camp1320.com sells H4H HID kits if you wanted to go that route. When I had first gotten my one pieces one bulb had only low beam while the other bulb had only high beam.