Rocinante, I ordered the Disc brakes from Southwest Wheel Co., www.southwestwheel.com
Since Disc brakes require a higher hydraulic pressure and I'm not sure what actuator I have for a possible upgrade of the master cylinder, I ordered an Atwood actuator, P/N A888740, which is made for Disc brakes, but presently on back-order. The installation doesn't seem to be a big issue.
