Amazon.com: Ecomills Coco Coir Door Mat, 36" x 48" x 0.5", Great for Double Doors, Heavy Duty, Indoor Outdoor, Large Size, Non-Slip Backing, Mats for Entry Ways, Garage, Floors, Patio, Entrance Areas :
Doortex Entrance Mats Rectangular Ribmat Indoor Entrance Mat (36" X 48") - Furniture Tycoon
Dutch Rib Mat With Border - 36" x 48" - Hard To Find Items