Craig and Sean, answer demanded and delivered: checking the Sollima discography
, it appears that neither of his compositions, i.e. "Terra Aria" and "Concerto Rotondo", which are on the "Daydream" music video, have been recorded commercially. Listening to some brief samples on Amazon, there didn't seem to be much of interest. So, there's plenty of nice cello music available, but nothing relating to this.
Incidentally, my reference to the Bachianas in the reply to Peter was because the accompaniment there is by eight cellos(aka celli). This work is included in the most beautiful vocal recording that I've ever heard, the Moffo/ Stokowski