Question about a song in the movie not on the soundtrack

[sinisterplague]

one of my favorite tunes in the movie starts out with organ music and then has some choir chanting "da da da da da da da da" or something like that.

It's played in two scenes. The first is the part after John reveals his explosives expertise and it shows Juan mesmerized and "banco de nacional" (or something like that) over John's head.

The other part is after Juan gets Mesa Verde and sees an execution by firing squad. The song plays after the execution when Juan sees the bank.
Does anyone know where I can download this song?

[uncknown]

download?
it is on the recently released Cinevox 2 cd set
check it out!