Question, do they have to be clean and is there a rating limit? For a good supply of them, you should see the "Twisted Christmas" CDs. (Buttcracker Suite, Most Fattening Time of the Year, Parking Spaces, etc) Link to that is here:
Bob Rivers Show
I also have some others like "Who put the D*** on the Snowman", "Frosty the Pervert", "Christmas Fod Melody" (from the movie Houseguest), and 2 Weird Al songs "Christmas at Ground Zero" and "Night Santa Went Crazy"
If you'd like, I can probually set up a FTP for you to download them and make your own CD from them. Save time looking for them on WinMX and Kazaa.