Welcome to "we ran out" land. The original Motorcraft vacuum diaphragm had a stock number of DD-190, and a Ford service stock number of C5AZ-12370-A. They were the threaded fitting type for a metal tube. Ford, in it's infinite wisdom, replace that type with a rubber hose fitting type (there is a hex socket adjustment inside the fitting), but kept the same identification numbers. Remember, all Ford care about is will "it" work", the were not building Concourse Grade Cars.
The diaphragm sometimes can be repaired. Look in the Library in the 66 section. This repair does not address a shiny diaphragm housing. I've wire brushed a few, but they look wire brushed. Eastwood sells several "paints" that give a better look. As far as I can tell, nobody provides a diaphragm rebuild service like Fred Ballard does with fuel pumps. There's where we are today.
Jim