'65 Power Brake Booster Question

The Midland-Ross boosters are easier to take apart than the Bendix, but I haven't seen rebuild kits. They also changed the style between 1965 and 1974, as I had 2 which externally appeared similar, one from my 1965 C-body and another from a 1974 Dart. I tried to swap the rear plates to get the bolt pattern for my 1965 booster but the sliding input cylinders were different diameters. The reason was that the 1965 diaphragm had a hole where the rubber was brittle at port, probably due to gas fumes from engine though I had an inline charcoal filter. If I could buy just the diaphragm plate, that would be great, but nada.

One idea is to use a much later booster as I did in my 1965 Dart which came w/ no booster (drum brakes) and I wanted one for eventual disk brakes. I installed the firewall brackets and lever from the 1974 Dart and bolted a booster from a 1990's Intrepid. I had to rat-tail file the mounting holes slightly to fit it. I also recall adding a bushing for the larger hole on the input rod, at the lever. That let me use any modern 2-bolt master cylinder. Instead of the one from the Intrepid (slanted reservoir), I used one for a 1990's Breeze w' ABS (2 ports). You can see it in my avatar.