I made the adapter plate in my shop using a drill press, die grinder, and a tap & die set. Used 3/8 aluminum flat, for weight savings and ease of grinding. Most all the calipers I've looked at are a little different, so you'd have to make your adapters after you get the calipers (got mine off e-bay, $80 for the calipers, stainless lines, and the master cyl. off the ZX-6) With the pistons also on the inside of the caliper the clearance to the spokes got REAL close. I used the 3/8 as it's the same dimension as the mounting plate of the stock calipers. No flex so far,(been on for a year now) works great. After you squeeze that lever the first time, it'll look a whole lot better!!
and you get that Eddie road racer look. I keep all the stuff I replace on the bike so I can put it back to stock if I ever sell it, or start to do shows.