Gale I use Ploar Notions plastic organizing boards to try to get my stash together. They are a nice hard plastic so you don't have the flimzy problem.
I got them at polarnotions.com
I tried the other coragated oranizing boards but wasn't as impressed with them.
What I like is that you can stack ou fabric on end like they do on bolts in the fabric stores so you can see what you have like books on shelves.
Hope this is a help .
Merry Christmas kjym Kathy