Just a bit of a bump on this.

There have been a few sets of CSL wheels both OEM and reps for sale recently to fit actual M3s but I've struggled to find anything with the offset for a non-M!

I will probably end up going for a set from that AutoStyling place Big H linked to above, but if I can find a decent second hand set that would be preferable as I am reluctant to spend more on wheels than I spent on the car!