I need some help with some Bach - the very small church choir is singing [View all]

"Jesu, Joy of Man's desiring" for Christmas in unison, in the soprano range. Does anyone know of a recording of this done an octave lower?
One alto and two basses will be forever in your debt. (with 3 sopranos, 1 alto, 1 falsetto tenor/true bass and 1 true bass, we don't do parts. ).