G. Schirmer/AMP has several choral works available for the Christmas season:

Adam/Grady: Christmas Song

Bach/Tyzik: Jesu, Joy of Man's Desiring

Grady: Adeste Fidelis

Grady: Angels We Have Heard on High

Gould: Christmas Time, Books One and Two

Gould: Home for Christmas

Gould: Serenade of Carols

Gruber/Grady: Silent Night

Novello Book of Carols

Reger/Grady: Virgin’s Slumber Song

Schubert/Grady: Ave Maria

Tyzik: Holiday Moods, Suites One, Two, and Three

Tyzik: Hark! The Herald Angels Sing (optional choir)