If they have a bracket on the back of the caliper you just need to make a custom bracket. A machine shop can do that. It's pretty common. Also, if the rotor doesn't fit you need to get a different rotor from Brembo. Most of BBKs are all the same and the manufacturer just make different brackets and rotor hats.
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here!
| Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors