Finally some progress! I'm on the hunt for new brake rotors as mine are a bit thin. Good chance to upgrade! I've sent off for pricing on some CSL parts.
M3 CSL oem replacement front rotors & carriers (calipers are the same, but painted black)
M3 CSL oem rear calipers (they have an upgraded piston, I assume this is to counter the increased front bias)
M3 drilled & slotted oem rear rotors (I found a part number - it was apparently an option for the ZCP and CSL, let's see if BMW have stock!)
Goodridge braided brake line kit (aftermarket, but they're definitely an upgrade. I'm cool with that)
Yay, more CSL bits haha *not making a replica*