I need a 42 .inx72 .in shower pan with either off-set 4-way drain or linear drain on short side. What would I need? What would you use for a 42 .inx72 .in

For a 42 .in x 72 .in Pan with the drain on the short side I would use the 48 .in x 24 .in wedi base extension (73783528) with the 48 .in x 60 .in x 2-1/2 .in wedi fundo riolito shower base (07510012). you will need to cut the 24 .in side to 12 .in on the extension to get your 72 .in and the installation height on the extension must be increased because the connected shower base is thicker than 1.5 .in at perimeter.