CANTEX 1-Gang PVC New Work Switch/Outlet Electrical Box in the Electrical Boxes department at Lowes.com
1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box, .0625 Galvanized Steel, (4) 1/2 In. & (6) 1/2-3/4 In. Side Knockouts; (2) 1/2 & (2) 3/4 In. Bottom Knockouts - Amazon.com
Old Work Switch and Outlet Box with Quick/Click | Wall Boxes | Electrical Boxes | Wiring Devices
Electrical Junction Boxes - Steel Products
Carlon 2-Gang 32 cu. in. Blue PVC New Work Electrical Switch and Outlet Box B232ACP - The Home Depot