MacCourt 3.7-ft L x 2.16-ft W Black High Density Polyethylene Pond Liner (30-Gallons) in the Pond Liners department at Lowes.com
VEVOR Pond Liner 15 ft. x 10 ft. 20 mil Thickness Corrosion-Proof Flexible LLDPE Fish Pond Liners for Artificial Lake, Black FSM10X15FT0000001V0 - The Home Depot
Fish Pond Liner Garden Pond Landscaping Pool Plastic Heavy Duty Membrane | eBay
EPDM Rubber Pond Liner 0.75mm | 5.5 Metre Roll | Underlay Options