. . . and this will be it. No, really.
Speaking of Varèse here . . . in surfing around today, I found that there is now available the very recording of Complete Works of Edgard Varèse, Vol. 1 which was such an inspiration to the young Frank Zappa.
And, FWIW, it seems to include, not the complete Déserts, but some of the electonic interludes.
At least, I think there was an interlude more than those three. Time to listen again . . . .