I've held back the great unreleased Bollinger tracks for a little later (there are I think three in the vault), whilst we try and find out some more about him. The XL / Sounds Of Memphis comp has his 1967 single 'You Can Lead Your Woman To The Altar'. Charles Chalmers - who produced the sessions - only memories of him were that he was from Chicago and was hard to record. 
Love to hear 'Gotta Hold On You'. Any chance of a soundclip?