I needed a plug cover for my truck (4 flat trailer plug) and couldn't find any that fit the bill. I cobbled together this version (using Fusion 360) which slides over the plug to protect it. The part was printed in black TPU.
I included the Fusion 360 file in case someone wants to modify it.
Printer Brand:
LulzBot
Printer:
TAZ 6
Rafts:
No
Supports:
No
Resolution:
0.2
Infill:
100%
Black