From what I can see, both front brake discs/rotors are basically the same: the LH one has predrilled holes for the ABS ring, but would work as a RH disc...are the non ABS discs the same size as ABS? if they are you could swap them about a bit, depending on your bike spec, and what parts are on reduced price offers!
Can you get just the brake disc part that the pads bite on? no need to replace the carrier parts on floating brakes, or all the fixing bobbins, washers and circlips!