Apparently there was an Bill Hjerpe LP, "Not For Sale", although I wonder if this was ever released. Bill also played harmonica on Paul Arnoldi's "One Note Man" LP on Kapp, and wrote the country tune "Regular On My Mind" which became a hit for Jim Ed Brown in 1966.
Navigation Blues / Not For Sale (Epic 5-9897. 1966)
Bill Hjerpe - Behind The Times / Mrs Frost (Epic 5-10026. 1966)