DJC Supply Co. 4" x 4" x 3" PVC Plastic Junction Conduit Box with Pre Molded 3/4" & 1/2" Conduit Holes, Easy to knock out covers, Metal screws - Amazon.com
Laxmi Electricals 3 Inch White PVC Junction Box, For Electric Fitting, Round
Garvin 72181-1 4-11/16 Welded Junction Box, 3 Inch Deep, 1 I
3" Schedule 40 LR Type Conduit Bodies and Junction Boxes