there was a thread on the golfmkv forum a few months back..
he didnt give part numbers but did show the vw/audi box and the are for the passat cc
only mod he did was trim a little bit of plastic around the housing to fit exact in the excisting bulb holder, he reported no porblems and worked straight away
if any of you have been in an audi q7 you will see how bright they are, i must say they are really nice, they dim after awhile and stay on very subtle and cool, dont think they will do this on the golf?
as i said, i did try last year around nov but he said they wasnt availble yet, they should be now..
somebody on here must have the time and funds to look into