Kerry, when it comes to repairing rather than replacing, you are a man after my own heart.

I can see now I have something to look forward to whenever I make it to the monovalves in these three old cars.

There's bound to be at least one that will need a monovalve kit. Rest assured if I find a source I'll post it!
Your quote; "No Indian or Iranian is going to buy a new master cylinder when it can be rebuilt" jogged my memory about TomJ and his expedition to India to explore for injector parts. Too bad we didn't put in a request for MC and monovalve kit sources while he was there.
Oh well, the search goes on!
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Diesel Discussion. Where learning is FUN!
1983 300D 296k work in progress
1985 300D (sandwiched) parts
1980 240D engine issue