I ran across this idea of wrapping the fabric around foam core boards at the little green bean and was inspired. I needed to go the least expensive route right now and I had some of those display boards, which we used for my daughter's graduation table, that I had picked up at the Dollar Tree and a couple I purchased at Walmart. They're basically the same thing, although I can't boast that they're acid free, but I've had my fabric on cardboard before and had no problems. And I was wondering if those cardboard bolts at the fabric store are acid free? I haven't checked that out yet, but I'm going with my cheapo display boards for now.
So far, I'm happy with it. :)