Retrofitting is the process of taking a stock housing and modifying it to fit a projector. The light outcome done properly will be worlds difference than the cheap ebay "projectors". The process can be time consuming so it is advised buying stock replacements off ebay or so... around 75-100. The Morimoto H1 Mini is the best way to go, pretty decent projector. I just got done with mine, and I know many other members have done it.
Store: The Retrofit Source online: headlight upgrades for all applications
Information: HiDplanet : The Official Automotive Lighting Forum - The Buzz
