VEVOR Shower Kit Tray 48 x 48 in. Shower Curb Overlay with 4 in. PVC Central Bonding Flange Polyethylene Shower Pan Liner LYDZT48X48PVCBSSLV0 - The Home Depot
Custom Shower Base - Built With Foam
Wedi US2000001 Fundo Primo 36 In x 72 In Shower Kit, Waterproof Board Installation System with Central Square Drain Grate Assembly, Prefabricated Sloped Shower Base (Shower Tray) and Lean Shower Curb - Amazon.com
Proven Way to Extend ANY Schluter Shower Tray - Home Repair Tutor