There are several brands of Electric Fridge/coolers that might well do the job for you. Some are 120/12 volt some 12 v only
I have an ENGEL (12/120V) i originally planned to put in the basement. On a slide out. but it's too big so it's inside, I use it as a FREEZER (it gets that cold) High efficiency COMPRESSOR type (Dometic and Norcold sell competing "Coolers")
I also have an Igloo. Thermoelectric. 12 volt only I have a "Vintage" model I use for medical storage on occasion. and for transport of Milk/and such on hot days in the car.
Lots of options.
