I would second or third Redbridge. It is the only one we have been able to find.
My wife also enjoys the Woodchuck ciders which are "naturally" gluten free. She enjoys the Amber and Granny Smith the most.
I second people's cider idea. I had a friend in college that had celiacs... he rolled into every party with his own cider 6-pack and/or 40oz'er. There are TONS of flavors and varieties of cider out there.