I got bamboozled into doing the sound effects for a play a friend is directing. I don't think I like the play, but I got my arm twisted. It's about an American tourist who goes to Mexico and becomes Emiliano Zapata - although I don't think I quite understand how that happens.

Anyhow, one scene calls for a trumpeter to play "El Niño Perdido" (The Lost Boy), which I believe is a Mexican folk song. I searched everywhere I can think of, but I can't find the music. Can anybody lead me to a MIDI or sheet music for this song? I've got the trumpeter, I think.
Thanks.
-Joe Offer-