Advent can be a struggle for Praise and Worship bands. We usually find ourselves scrambling to find Christmas music that is not normally in our repertoire. The traditional carols and Christmas hymns should usually be left to the brass band, so that can even further narrow your choices of tunes!
We have a couple of resources below that will hopefully help you in your search for good Christmas Praise and Worship songs for Advent.
This requires a free subscription to their website, but this site has fantastic resources for Praise and Worship musicians. They also give away free content such as this on a regular basis. It is definitely worth the free subscription to their mailing list!
DMD Andrew Barrington, Anthony Barrington, and Jimmy Cox have written new melodies and contemporary arrangements for a pair of classic Christmas songs. The songs are "Come To My Heart, Jesus" and "Come Thou Long Expected Jesus."