Hi there. I have several red HS33's here both new and used. If you wanted that set up lightly used with black brake pads, new four bolt mounts and new undersaddle lever mount, with line calculated for your unicycle, bled and tested on my brake test jig: $140 shipped in the USA. If you wanted to substitute a new NOS red HS33, the price for the package is $180 shipped.
Let me know if you want to see pics of anything.
I'm also at: firstname.lastname@example.org and cell/text at 503-358-2252