You can grind an A-65 to .010 under, then again to .020 under--- and
get bearings for them. There are a few cranks left around. I just
removed a crankshaft from a C-85 for replacement with an O-200
crankshaft. You can use a C-85 crank in the A-65.

As soon as they get so scarce it makes the investment worth it, ECI or
Superior or somebody will start making cranks. As easy as it is to
tool up nowadays with all these computer-controlled machine shops, I
don't understand why A-65's, A-75's, and A-80's are not being
manufactured. They are great engines, much more dependable and
torquier than their competitors like the R and the J. And they turn
at reasonable RPM's for good prop aesthetics and good prop efficiency.
AND --- they will sip mogas at 4 gallons per hour.