Electrical Power Outlet Box Extender - Multi-Gang Non-Metallic Electrical Box Extender - Receptacle Outlet Box Extender, Electrical Outlet Extender for Electrical Box and Electrical Outlet Switches, ETL Listed - Single Gang 2-Pack –
Sigma Engineered Solutions 1-Gang Gray Metal Weatherproof New Work Standard Box Extender Exterior Electrical Box in the Electrical Boxes department at Lowes.com
Hubbell-Raco 5406-0 Weatherproof Extension Box, 1 Gang, 18.3 Cu-in X 4-1/2 in L X 2-3/4 in W X 1 in D, Outlet Boxes - Amazon Canada
1/2" Two Gang ReceptXtenders Outlet Box Extender 5-Pack, Outlet Boxes - Amazon Canada
Electrical Box 1 Gang Receptacle Extension Ring 1/2 in. Non-Metallic 5 Pack Blue 313098119180 | eBay
iMBAPrice BE1-1 (1-Gang) Electrical Power Outlet Box Extender - White (Made in USA) | Best Buy Canada