For CDs, T-shirts, Greasy Spawn toques, and other eldritch miscellany, visit the official The Darkest of the Hillside Thickets store.Compact Discs by themselves are handled through these fine vendors:
Divine Industries
CDBaby
Amazon.com

iTunes:
Spaceship Zero Original Motion Picture Soundtrack
Great Old Ones
Cthulhu Strikes Back
Or order them through your local CD store.

Cthulhu Strikes Back Special Edition
CTHULHU STRIKES BACK 3rd printing

Great Old Ones
GREAT OLD ONES 2nd printing

Spaceship Zero Original Motion Picture Soundtrack
http://www.spaceshipzero.com/ for more info

The Shadow Out of Time
1st printing