Southwire 1-Gang PVC Old Work Adjustable Electrical Box in the Electrical Boxes department at Lowes.com
Cantex Electrical Box, PVC, 6-3/4" x 6-3/4" x 4-1/8", 3 gang 5133710 | Zoro
3/4" PVC Deep Box Single Gang FDE w/ Adaptors | Hog Slat
Newhouse Hardware 1-Gang PVC Old Work Electrical Outlet Box (12-Pack) | 14 cu. in. Plastic Junction Box for Switches, GFCI, or Duplex Receptacle Outlet | Old Work Electrical Box for Home Improvement - Amazon.com
PVC Single Gang Box 1/2" FS - Growers Supply
Carlon 3-Gang 44 cu. in. PVC New Work Electrical Switch and Outlet Box B344AB - The Home Depot
IPEX 077607 FSC10 1/2 Inch Hub 17 In. PVC 1-Gang Rigid Conduit Box | Cooper Electric
Newhouse Hardware 1-Gang PVC Old Work Electrical Outlet Box (1-Pack) | 14 cu. in. Plastic Junction Box for Switches, GFCI, or Duplex Receptacle Outlet | Electrical Box for Home Improvement - Amazon.com
PVC FD Single Gang (Deep) Box
Lamson Home 2-Gang Electrical Switch and Outlet Box, Blue, PVC, 25 Cu.in. - Walmart.com
FD Blank F-Series Triple Gang Box - Kraloy Fittings