I have an almost complete set of Mafac cantilever brakes for sale for $45.00 including mailing in the USA. It includes the four arms, four chrome head attaching bolts, one carrier wire, two posts and pads, and the four springs. The set needs a carrier wire (if Mafac Racer centerpulls are the same, I can supply that), two carriers, and two posts with pads. They nuts for tightening the posts have rust on them. They also have a hole drilled in each one through one side.
The brakes can be seen at the following:
http://www.wooljersey.com/
Thank you.
Cheers.
Tom Hayes
Chagrin Falls, Ohio USA