Would anyone have any idea where I might be able to track down a copy (eiter Digital or on CD/Tape/Record) of Billy Brown's Cinderella, released in 1977? (I think he was playing with The Freshmen at the time, and the song is sometimes referred to as "I Fell In Love With Cinderella")

My mother has fond memories of it, but I'm having no luck whatsoever getting a hold of it.