I feel this may be late in the day, but any one in the midlands Northants area there is a company called wheelclinic, who also have a web site by the same name.
They do all the top of the range vehicles, the wheels look like they have just come out of the box, except there is no box.
I have had 4 sets of wheels done over the last five years with no adverse effects
give them a try.
ps about the same turnaround time ie 5 working days
regard
maggot