Carlon 14 cu. in. PVC Old Work Electrical Outlet Box (1-Gang ) B114RB - The Home Depot
Single Gang Rework Device Box 3"x2"x2-1/4" Walectric
2-Gang 25 Cubic Inch Old Work Retrofit Standard Switch/Outlet Wall Electrical Box
How to Install an Old Work (Retrofit) Electrical Box
Arlington 2-Gang Retrofit Recessed TV Electrical Outlet Box, Paintable, White - Procuru.com - Plumbing, Electric & Lighting Wholesale
Wall Mounted Mild Steel Retrofit Electrical Box, for Junction Boxes at Rs 50/piece in Ghaziabad
How to install an electrical box (remodel) - YouTube
Arlington DBHR131W-1 Low Profile IN BOX Electrical Box with Weatherproof Cover for Retrofit Siding Construction, 1/4-Inch or 5/16-Inch Lap, Horizontal, White - - Amazon.com
Arlington DBVR141W-1 Low Profile IN BOX Electrical Box with Weatherproof Cover for Retrofit Siding Construction, 1/2-Inch Lap, Vertical, White - Outside Electrical Box - Amazon.com
How to Install an Old Work (Retrofit) Electrical Box