nikgam

i have a feb 04 530d in titanium silver, have fitted a sport kit 18" m5 alloys am awaiting m5 steering wheel with paddle shift, but what i cant get my head around is why the muppet who bought the car from new(which wasnt me ) didnt have bt prep on the car .so does anyone know of a retro fit? i dont realy want to start screwing things to the dash and would love to use hands free through my steering wheel.any advise please? thanks nick