I have a '98 GS 400 and one of the HID headlamps went out, from searching the forums, it seems to me that the replacement bulb is D2R, @ http://hid-lights.com/ they have that bulb for $40. This seems alittle cheaper than what everyone has been talking about when replacing their bulbs. Is that the right bulb, and does anyone have a guide or walk through on replacing them. Thanks for any help.