Plug and cord hook, low profile:
https://www.thingiverse.com/thing:3723366
Simple perpendicular plug with cord hook:
https://www.thingiverse.com/thing:230595
Box cradle with plug, 2 parts:
https://www.thingiverse.com/thing:1122203
Outdoor cabinet:
https://www.lowes.com/pd/vevor-Steel-Electrical-Box-16-x-12-x-6-inch-Electrical-Enclosure-Box-Carbon-Steel-Hinged-Junction-Box-IP65-Weatherproof-Metal-Box-Wall-Mounted-Electronic-Equipment-Enclosure-Box-with-Mounting-Plate/5014065289
https://www.lowes.com/pd/vevor-Steel-Electrical-Box-12-x-10-x-6-inch-Electrical-Enclosure-Box-Carbon-Steel-Hinged-Junction-Box-IP65-Weatherproof-Metal-Box-Wall-Mounted-Electronic-Equipment-Enclosure-Box-with-Mounting-Plate/5014065279
I like the idea of small bungees for the straps, instead of zip ties or cutting holes for velcro that's hard to thread through.