I called around to sign shops and asked for scraps. Some I paid for, lots were free. Took a couple months to get enough but I am nearly finished and my daughter is waiting for my left overs.
One individual shop owner said she would order some sheets for me next time she orders and even cut them to a manageable size for me. I got loads of scraps from her for 10.
My sewing room never looked so good. I have 2 old pattern cabinets from a fabric store, they have metal rollers and are 24 inches deep, even have the dividers still in them. I have my boards 2 deep front to back and I just roll out the drawer color I want. WONDERFUL!!! After those 8 drawers were filled I have 2 shelves filled on a bookshelf. Sure beats heavy plastic containers having to be lifted and plowed through and then lifted back to the shelf.