I have also been looking for the musical score and words. as I remember it the words are:

Little drummer boy you'r all the world to me
dressed up in your little soldier clothes.
Little drummer boy
come climb upon my knee
and rest your weary head in sweet repose
Chorus
The day is ended little drummer boy
Lights out was sounded long ago
So close your eyes my little drummer boy
And dream of the ones which you love so.
Reveille will sound in the morning
Once more on parade you will go
So close your eyes my little drummer boy
And say goodnight to all your friends and foes

Now the day'is through the sandma's on his way
Bringing you a bag of golden dreams
Little drummer boy
Once again you'l play
in a land of magic golden dreams
Chorus

If anyone has the music please send to me. I will pay all costs.
john@lashies.co.za