Any napa store has paper manuals out the whazoo. But it takes real counter pros to read one. They can id your wheel cylinder off a partial number and by using the illustrations in the pictorial guides in "the book". If they try and find this stuff in the dbase on the pooter, run away, they don't have a clue as to what they are doing.
Wagner/lockheed is common id on wheel and master cylinders for worldwide applications, the "brand" doesn't mean anything. In some case the design of a particular brake system is proprietary to a single manufacturer/supplier. That is most especially true with IH components. The Scout 80 also could have had the optional 10" brake system on the front, those brakes are a "lockheed" design and none of those parts interchange with any of the other brakes systems as supplied originally by bendix, that is why we refer to those as the "lockheed" pattern.
One more time...post pics of your brake parts that ya have, then I can give you more complete info. And...tell us which of the brake systems you have as compared to the parts list I posted!