I replaced my Norcold 811 a few years ago. Best mod ever. I added a 1000 watt inverter to run it while traveling and boondocking. Uses about 3 amps starting and less than an amp while running. Found out while traveling if you keep the door closed it doesn’t drop much in temperature driving for 8 hours.
I used a Frigidaire Fftr1222QM as the replacement. That model has been superseded with this model FFET1222UV. Check the dimensions and see if it will fit your cabinet opening and that you can get it through your coaches doorway.