After reading Alaskasunshine's thread with great photos showing how she wrapped her fabric on Coroplast boards, I found a local sign shop that would sell me 4' x 8' sheets for $15 each. I ended up needing a lot more boards than expected, and it was a job cutting them up (used old blades in my 60mm rotary cutter), but buying a few at a time over a period of a couple of months, it didn't seem so bad. I also cut up comic boards to fold smaller pieces of fabric around. Shopping my stash for the several projects completed since then has been so different from before. It's just wonderful!