These aren't commercially-available CDs, but if you're interested in making your own playlist or purchasing the music and burning your own mix CD, the following might work for you.
When I was doing massage therapy, I made my own mix tapes for background music. The one I used most was from R. Carlos Nakai's album Earth Spirit - I didn't use the tracks with the eagle bone flute, because it was quite high-pitched, but the remainder were very nice. I had a few clients ask me where they could get their own.
On another, I used selected tracks from Yo-Yo Ma and Bobby McFerrin's album Hush, and I had two classical music mixes - one exclusively classical guitar (Julian Bream and Andres Segovia), and the other orchestral.
Sadly, I don't have any of those track listings on my current computer, but I'll be able to get to that info in a week or two, so PM me if you're interested.