Mike,
I figured that the best way was to simply replace everything... Unbolt the entire light figure/housing (everything glass) and replace it with the HID housing. That's what I meant by finding it at a scrap yard.
My intention was never to just replace the bulb. Some of my co-workers have replaced the bulb (and added the ballast, ignitor, etc., etc.) and the glare sucks. Also, the color sucks. Sunlight at high noon is around 6000k in color. Why would you want an 8000k bulb?
In essence, I want to know how difficult it is to source parts and convert the car to a "Stock HID set-up". Said another way: The final product will appear as if I had ordered HID lights direct from the factory.
So my question is, when I go to the scrap yard and find a rear-ended 2002-2004 Lexus ES 300 with High Intensity Discharge lights, what parts do I need to rip out of the vehicle?