The actuators are still available, I believe. Don't bother with "rebuild" kits that contain the diaphragm, as they're a ripoff and you'll most likely destroy the actuator trying to disassemble it, since it's 50 year old plastic.Just drove the car home. IP flush with new oil, new mounts and engine strut, valve adjustment and new brakes among other things have really improved smoothness.
We did find the central locking "bellows" or actuators are leaking. Is there a kit or a replacement part # that folks use to replace these?