Well... I don't know much about this score, but I assume it was never officially released by the studio or by Howe Records, nor was it ever released with the film (as, say, an alternate cut on a DVD). So, unless it came directly from an inside source (or directly from the composer, as with Yared's rejected Troy), I honestly can't think of where else it could have come from.
Darn, the account got closed before I get a listen, thus continuing my week of musical disappointment (Tomomorrowland going OOP, Sia joining the My Little Pony movie).
Just now hearing this great score. Ron Howard should have his head examined if it was his decision to reject Shore’s music. This is the sound of his that I like best. As if The Fly had kept on... evolving.