If you have HID as stock then the bulb is D4S and no kit is required. The bulb will just plug in.
http://cgi.ebay.com/ebaymotors/PHILIPS-D4S...1205|240%3A1318
If you want to get the bulb somewhere I can probably give you easy enough instructions for installing it. It's not hard to see how to do it, but you may scrape some knuckles as it's a pretty confined space to work in.
Thanks much!
As far as installing it, from what they were explaining to me, because the bulb was on the outside, it's pretty tough to get to(like you were saying) and they were talking about taking off part of the bumper or something. I'm not sure how comfortable I'll be with doing something too involved, but if you want to pass along instructions, I can evaluate from there, and maybe give it a shot.
But that bulb will save me over $300 alone, so thanks again!
I haven't changed a bulb on a OEM HID but it wasn't that hard to change bulbs when installing a HID kit on a Halogen setup. The following shows some pics of how to get to the bulb.
http://my.is/forums/f154/tutorial-how-inst...50-pics-335885/