My Bosch SHU66C has suddenly (by itself) decided to change the wash times
for the various cycles that it has. The times no longer match those listed
in the manual. I suspect I need a new logic board. I was wondering if anyone
could recommend where in the U.S. I could buy the right part. And I also
need the part number.

I'm thinking this is what I need to do because this happened to my
sister-in-law as well (she has a different model of Bosch), and they got
their control board from a local supplier (they're across the country,
unfortunately). My nephew then replaced it very easily.