Rogue Engineering carries wheel studs fit all BMWs that use M12 x 1.5mm wheel bolts.  They are available in an 75mm "Street/Track" version or a 82mm "Pro" Version

Street/Track  Studs Technical Specifications

• Hardened and tempered to Grade 10.9 class to DIN/ISO 898.
• Max Torque: 180Nm (132 lb-ft) - recommended torque on BMW applications is 80 ft. lbs.
• Black Zinc Plating, for corrosion resistance.
• 75mm stud length, with 12mm smooth bullet nose
• 5.5mm allen key end, for easier installation
• Studs are made with M12x1.5 threads. M12x1.5 conical lug nuts sold separately
• Allows for up to 12mm spacer

These studs to NOT fit the following vehicles:

• E53 X5
• E65 7-series (who would put studs on a 7-series?)