I understand your reasons but then again, I came forward on the forum in the hopes someone would be kind enough to help out since that's the intended purpose of the forum.. If I had wanted a turn key solution, I would have posted in the vendors section... I'll just keep looking and hoping someone else on here sees the thread and can chime in.
For what it's worth, I already went to the dealer, they told me that they wouldn't do that retrofit for me. They do retrofits but just not for my type of car. I'm also waiting for a quote from bimmer-tech, who knows maybe the pricing will be competitive and not worth me doing all the work myself...