I know this is a long shot, but I own the 1971 version from Freemark Abbey and that would make one bitchin’ tasting!
Will buy, trade or do windows for…
TTT
bump
that is an awesome bottle of wine. good luck with the search
I have a bottle of '71 Monte Bello if that helps you.
Bump.
A long shot…
TTT
Does Press have a bottle?
If so, you could do a tasting there.
bern’s had this bottle just a year or two ago, and the price was something like $70-75… and it was actually really good.
You could ask those on CT with bottles if they’d sell. 14 bottles out there.
I tasted an 84’ of this last year, it was great! Does that help? 
bump
TTT
Hey Paul- I just came across one today. Split a cellar with a friend, he ended up with the '71 YC.
I’ll ask him if he’d like to sell it.
I would appreciate that!
TTT