If you click on the "Teacher's Guide" link you can see a complete list of accompaniments (except for holiday) for violin and where to find them on this site. If a piece says "VPM" next to it, click on the VP Method tab and go to the "Home Concert" category for each level. (A1, A2 and B1)
Teacher Guides

Frost: Christmas Kaleidoscope, volume 1, Frost: Christmas Kaleidoscope, volume 2, Mannheim Steamroller, Martin: Festive Strings Ensembles, Martin: More Festive Strings Ensembles, Misc., OReilly: Christmas and Chanukah
 Folk and Fiddle Tunes