How about Glass Harp?
Phil Keaggy. Saw him in 1980.
As for Larry Norman; I bought two tickets to see him and Randy Stonehill but the concert was cancelled due to lack of interest.
Sad but true.
(sound of grey_whiskers purring!)
Note also the rumor that Ted Nugent supposedly said, "I don't know whatever happened to that Phil Keaggy. He could have saved the world with his guitar."
I *did* manage to track the Jimi Hendrix / Keaggy rumor as far back as (IIRC, it was many years ago) the Feb. '75 or Feb. '76 Saturday Evening Post...
Cheers!