Woahh, that is a long list from you.
My friend in Germany, the Meister of this repair shop which made my hydraulic hoses as you remember, got the ATE parts catalog from someone in ATE, and they could not find these parts as single item, and it was also confirmed by the technical department in ATE.
They only sell new ones.
So the only ones where one could (maybe) get the single wear parts, are these companies which are specialized in remanufacturing and which have their own subsuppliers for these parts.
So we have now sent an email to Cardone in USA and asked them if they can sell separate wear parts instead of complete reman units.
My backyard hack mechanic buddy Mike (BTW: he is also from Australia and lives a long time in Japan) has done it, as he owns a company and maybe it is better they get the inquiry from a company instead of from an individual person.
Let's see what they answer. Will keep you informed.