I asked the bloke at Hope when I called a few months about the availability of 205mm rotors (I have a 6 bolt one) and he seemed to indicate that they will cut one to order if you go through a bike shop.
Yeah has to be a 205 I made the mistake of getting a enduro 4 caliper number 6 205 built thinking I could find a 205mm rotor easy as 185's and 165's seem pretty easy to come by. The one pictured is a brand new up opened 185mm for the rear