For the larger pieces, you can go to your local fabric store and see if they have any fabric bolt boards that they are throwing away. If you can't get any ( or enough), then what I did was got some cardboard cut it down to 8 x 24 inch pieces, and taped two pieces together so it would be sturdy. I used painters tape, and made sure to cover all cut edges of the cardboard. Then wrap the fabric onto the bolts just like they do at the store.
For 1/2 & 1/4 yards & fat quarters, I bought @ joanns a couple of "Artbin super satchel double deep" containers. These can be pricey, so watch for sales or coupons. I got lucky last week & got them for $13 each.