Instead of finding each concert piece on your own, here is a list of all four pieces for the seventh grade band. I hope this helps you with your final concert preparations!
Antiphon
http://www.jwpepper.com/Antiphon/10279373.item#.VmGN5GSrRAY
Fire Dance
http://www.jwpepper.com/Fire-Dance/2470631.item#.VmGODWSrRAY
O Come Emmanuel
http://www.jwpepper.com/O-Come-Emmanuel/10279789.item#.VmGOS2SrRAY
Jingle Bells, Samba Bells
http://www.jwpepper.com/Jingle-Bells%21-Samba-Bells%21/10459611.item#.VmGOfmSrRAY