Gang Electrical Box Bundle - 4 x 4 Inch Metal Electrical Outlet Box with Outlet Cover Box, 2 Receptacles and Grounding Wire | Drawn Construction Electrical Box with Knockouts | Airmont Products :
Electrical Faceplate Types and Dimensions - Archtoolbox
LIDER Matte Finish Quadruple Decorator Switch Cover, 4 Gang Outlet Wall Plate, Mid-Size 4-Gang 4.88" x 8.58", Unbreakable Polycarbonate Thermoplastic, UL Listed, LWP-34M-BK, Black : Amazon.co.uk: DIY & Tools
Oak Reclaimed Wood Wall Plate - 4 Gang GFCI-Decora-Rocker Switch Cover Plate - Virgin Timber Lumber