Chuck, just sent an info request to
www.qtmi.com these guys have a snazzy website, and seem to make their money off of chroming brembo calipers and fashioning mounts to adapt exclusively to cruisers. As with anything else, their main focus is the Harley market, with some scant attention paid to victory motorcycles, and old Nortons of all bikes. There's probably a data source somewhere that can tell you the center point to center point dimension for the caliper mounts (my rough measurement was 4 centimeters), if you can find another caliper for something close to a 310 mm front rotor (like the 308 mm TT600 rotor) and matched that caliper mount spacing, you should be in business. The TT600 calipers that I snagged are opposed 4-piston and look like they will dimensionally fit around the rotor and rim, just need to figure out that caliper mount discrepancy!