Lionel, I have a 1985 recording of Douglas Moore playing Foote's Cello Concerto accompanied by the Rochester Symphony Orchestra conducted by Jere Lantz. That's Rochester, New York, not Kent! In the concert programme it is noted that "To make modern day performances possible, Douglas Moore edited the score to correct numerous errors by comparing the fair copy with the manuscript score, which is in the New York Public Library at Lincoln Center. After a piano reduction was made for early performances, each page of each instrumental part was corrected so as to agree with the corrected score so that performances with orchestra would be possible." The note also states that Moore had performed the work "a dozen times" since 1981. I don't know if you are aware of this.
It is, I agree, a lovely work and fully up to Foote's high standard. It's neglect is such a shame.