One of the many blessings of working at the church I'm appointed to is having a trained graphic designer on staff who takes on most of our communications needs. She doesn't just make fliers (though she does), she also manages our website, email communications, and designs our publicity materials for our various campaigns and sermon series. As pastor of communications, I don't have to do the tricky stuff ... I get to deal with overall vision and scope, while my team does a stellar job of bringing our big ideas to life.
I don't know if you're church needs it or not, but we're offering our main graphic for our Advent series here for free.
It should give you a lot of room to use as you're church needs, for bulletins, fliers, banners ... Whatever you need.
As always, if you use it, just leave a comment to let us know how far it's gone!
You can also check out worship helps for the Hope is On the Way Series here. And sermon notes at the GBOD worship site here.