Yes was unreleased at the time. Don't think anyone has brought it out on 45 since the CD came out, but may be wrong. I have it on a 10" acetate (along with other unreleased detroit goodies, Spyder Turner, Joey Kingfish, Edwin Starr etc ) from Mr Bicknell, which I think was cut from the tapes before the CD came out.
Fantastic record, classy. A lot of the ones on the unreleased Groovesville CD all sound sparse and half finished, but this one is a bit more complete. Its only fault is its a tad longer than it needs to be IMO.