I'm looking to upgrade my current brake system on my series 2 stagea, I'll need at least 324mm rotors for the front up to 355mm, to clear the inner diameter of the wheel- to-caliper distance as the current 297mm calipers are hitting the rims on the inner shoulder of calipers and to clear would need to use a 15mm thick spacer.
Will consider all brands, but will require them to be in usable condition and be able to get pads/spares etc if needed in future.