I've heard that Cayenne S rotors work also but I haven't confirmed that. They are not drilled. You could probably find out by searching Rennlist and if you do figure it out let me know 
(edited I put Cayman there at first I meant the Cayenne rotors.....grr why don't Porsches have numbers instead of names)

(edited I put Cayman there at first I meant the Cayenne rotors.....grr why don't Porsches have numbers instead of names)