I did the same thing. I went to the Dollar Tree and purchased foam boards for, yes, .99 cents. I cut them up and placed my fabrics as you demonstrated. It took me a month and just loaded them onto my shelves. I used rubber bands to secure the fabric. My problem is that I don't have them organized by color yet like you have yours. That's another project I need to do when I get a chance. Thanks for posting pictures, your sewing room looks awesome!