Those of you who are beginning to prepare for the Christmas Season may wish to recall the good Fathers of the Norbertine Abbey of St. Michael's in California put out a CD in the past year or two of the chants of the three Masses of Christmas.
Evidently however, if you wish to listen to them on or after Christmas, you will need to order now so that they might arrive in time: Christmas at St. Michael's Abbey: Chants for the Three Masses of Christmas.
Audio samples are available on the above site.