no idea about the availability of the parts Tim, I just have
that booklet saved for the diagrams and lists - note also that there's some early
"AC generator" [alternator] info in it [1958] including a Delco 6V alternator

Chris - having the circuit diagrams with it does make it fairly simple, just be a chore to fab the mounting hardware, a good Denny job

I've been considering adding a 2nd alternator to my bus, just need to have it switchable so it isn't robbing HP when not needed
Bill