BPL-Shop-Accessories-Bulk Fabric-Cuben had the cuben piece listed and not marked as "Sold" as some other fabrics were marked. Being naive I thought that meant that piece was for sale in the BPL SHOP. Noooooo, it is "out of stock".
Somehow, some fabric items have been sold while others are simply out of stock. The nuances of the situation still escape me. Perhaps BPL has ordered more pieces that are exactly 49" by 14.5', when the roll is 54" wide.
That is possible but seems a little unlikely.