I have a set of Macht Schnell Stud conversion kits that are used.
They're currently on my car, but will be taking them off within the next 2 weeks. Two of the nuts are stripped on the exterior (NOT THE THREADS), so you'll need to replace this with 2 nuts yourself (~$2.50/ea).
They're the 75mm length ones.
2011 e92 JzB 6MT
Akrapovic Evolution, ESS Tune, UUC SSK w/ DSSR, Stoptech SS brake lines, Eibach springs, OEM gloss black kidney grills, keyhole delete, LUX H8 3.0, full front clear bra, 20% tint, Macht Schenll Stud Conversion, Apex ARC-8 18x9.5/10 w/ 265/35 & 285/30 AD08's