If it was me and the only issue you have is with the water line, I would turn off the icemaker line under the kitchen sink, and purchase a portable Icemaker. The other option would be to use ice cube trays in the freezer compartment. I, along with help, removed a smaller Dometic from SOB Fiver several years ago, and decided after that, if my Norcold quits and I have to take it out, it will not go back in. It will be replaced with a Residential fridge!
Rick and Mindy
2013 Redwood 31SL, 2011 Ford F350 SRW, 6.7, Crew Cab with Firestone Bags, Titan Disc Brakes