"Little Drummer Boy" is on the previously-mentioned "Gorilla Biscuits," the
Gurus' B-sides collection...
 
WILL
 
P.S.  If you're lucky enough to find it, there's a limited-edition
double-disc set, "Electric Soup" and "Gorilla Biscuits," the first disc being
an almost-immaculate greatest-hits collection.  (Wow, there sure were a lot
of hyphens in the last sentence!)