I've been looking around s14 and searching for part numbers.. But are e30 M3 Rear brake carriers trully a one off? I know they have different part numbers than anything I've found so far. But, I just bought some re-built rear calipers and they look a whole lot like 318TI calipers (and the price was the exact same). So, just curious if the carrier can be used from another brake. They will be hooking up to e30 M3 trailing arms by the way...