FTO GPX brakes are the same as Evo III.. Just troll ebay and you will find em ..
I have seen the GTO brakes on a GSR .. Just needed brackets and some wheels with a bit of space to clear the Caliper... I think they are 4spot calipers too ...
Ummm.. I can't remember ... I think they are 276 .. I got them from the boys at Meek some time ago ... They are sweet ... I put the same ones on the FTO as well ... (5 stud of course) ...