Saab also use the same size bolts 12x1.5 roughly 28mm length, in case you don't have a BMW place nearby. I've been a huge fan however of RAD bolts and locks. They make bolts for BBS, OZ, Ronal, MIM, and numerous other companies. Made in Germany, and all 10.9 rated. Good stuff, but they come a matte grey color, not black.