I've asked before, but this thread seems to be attracting people who might know the answer to this (these) question(s).

Do you know where Doug Bush is?
Or if he's alive?
Or where he was last seen?
Do you know anyonw who might know?

Al Cromwell and Doud Bush were a duo back at the time when we were all besotted with Sonny Terry and Brownie McGee. So far, Google reveals nothing.