I've been all over this forum, and others to look at options available for retrofitting HIDs (not getting them in existing halogen reflectors). I'm not very comfortable opening up the stock lamps by myself.
First of course is to locate and buy the complete equipment. Will pay a visit to a few markets to see if any second hand ones are available. If not, thinking of ordering the complete kit from TRS. Expensive, but peace of mind.
One option is to buy copies / used lamps and open those, or to get the retrofitting done by some qualified electrical guy. I live in Karachi.
I've seen quite a few of Pakwheelers have retrofitted their headlamps. Any suggestions / guidance?