Amazon has the 3-Pack CleverMade Collapsible Plastic Grocery Shopping Baskets (Graphite; 8031425-1533PKV2) for $29 with free shipping. Has 22 lbs capacity and measures 15.6" x 10.2" x 8.25".
Amazon has the Great Stuff Smart Dispenser Pestblock for $7.98 with free shipping on $25+ or with Prime. Expands to fill, seal and insulate gaps up to 1".