1/2" ReceptXtenders (one), Single Gang Receptacle Outlet Box Extender. UL Listed, Mud Ring by WGDepot, Outlet Boxes - Amazon Canada
Sigma Engineered Solutions 1-Gang Gray Metal Weatherproof New Work Standard Box Extender Exterior Electrical Box in the Electrical Boxes department at Lowes.com
Arlington Two Gang Box Extender without Screws, Model BE2 — Orka
One Gang Weatherproof Boxes, Extension Rings and Covers... WP, WPCV, WPRE, WIU, & WPEXB Series - YouTube