Rumor has it that all of these rotors are somewhat interchangeable. Anyone have any knowledge on this? I'd love to buy some 599 rotors and put them on my Cali so I don't have to fork out 4k from Racing Brake. It seems like every time I check their site, they go up in price. Should have bought them last year apparently. If anyone else has leads on where to buy Cali iron rotors - let me know. Reached out to GiroDisc to see if their 458 rotors will fit a Cali but they never got back to me.... guess not. Also, I don't drive my car like I'm on fire as I work from home and usually just chauffeur my daughter to/from school so performance doesn't really matter to me.