Should be able to make those fit. Some cardboard for working out a mock-up, Good chunk of aluminum, a drill and coping saw and you could have a bracket made up in a couple hours.
If you have access to machinary even less time.
Depending on the care you use, it could be made to look factory.
Once put disk brakes on a ranger 7.5" rear axle (for mudding) using half inch aluminum plate, power tools at the time were limited to a drill and a belt sander. spent two hours per side on the brackets
Clamp the calipers to the disk where you want them to sit using a couple wooden shims between disk and pad (to center caliper), then use cardboard to make up a bracket to connect the caliper mounts to the bracket mounts on the fork. For the vertical pivot a plate on the backside works well, just use through bolts, don't just tap the aluminum and expect it to hold. can be made as elaborate or as plain as you want.
Ken.