I recently picked up eight (8) Primex enclosures from AC-WB Technologies in Auckland, New Zealand.
They were incredibly cheap and locally sourced for me.
This video includes the @LawrenceDriveLights garden house test with a paper-towel inside.
Part 5 Finally finished (well sort of) the Falcon F16 & F48 4 String Differential Receiver Board and Power Supplies in a waterproof enclosure for Christmas Lights
Part 1 of the build series is here