So just come across these. They are not for the purist restorer but they are lighter/better and are fully floating like modern discs.
Good original discs are getting hard and expensive to get hold of, alternatively you risk a punt on auction sites and hope its not warped.
Perfect for cafe racers using cb500 & cb550 6 bolt hubs. or original machines for better braking.
wil also work with the AP caliper set up elswhere