Here are the parts numbers for my C60 which I ordered and installed with in the last year.
Item Vehicle Orginal Make Part # Original Casting # New Make Part # New
Brake Cylinders
Front 1-3/8 C60 Ford 91Y-2261 4 / S231
http://www.macsautoparts.com/pu.html
Rear 1-1/2 C60 Ford 91T-2261 6 / S232
http://www.macsautoparts.com/pu.html