Outer Limits 4x4 Board

I've got a fridge that lives in my truck and lives on, and don't currently have a dual batt. As $$ are limited so DBS is out for a while, I currently come home and run a lead through the rear window to power the fridge overnight.
I want to know if there are any decent (as in, set and forget, no maintenance) 240v sockets that I can install outside the vehicle and 'hardwire' the fridge into that, so I can just plug a lead into the exterior of the car...?! It obviously need to be pretty well sealed to endure dust, mud, washing, rivers, all the usual things.

Does anything exist that people have seen/ used? Is caravan stuff worth thinking about?

Thanks.

Hi ash, just find either a caravan accessories outlet or an electrical wholesaler. Clipsal and HPM both make the exact weather froof power inlet socket that you are after.

Cheers