Thanks, Evan!
That's where I thought they should reside, but when I navigate to that folder during the locator repair process, BA does not seem to find any feature classes it likes. In fact, I do not see any GDBs, SDCs, SHPs, etc. when I examine the folder (see attached screenshot). I even went back to the original BA installation thumb drive, and the files in that USA Geocoding Service folder looks exactly like the one I attached.
It's got me stumped- thanks again for your time!
Pete