VAC makes high quality spacers & extended lug kits:
I would get extended lugs with any spacer to be on the safe side (or a stud kit).
I have F/R spacers from VAC on my car. Beautifully machined and not expensive.
2011 BMW 335i E92 - Le Mans Blue, 6MT, M Sport. JRZ RS Pro, Quaife LSD, BMW Perf Exhaust