I have the same issue with a 2006 Dometic. Finally leaked all the ammonia. Been researching and looking on sales forums. Seems having a local shop rebuild with the Amish replacement is the best bet, and most cost effective. You can buy a used fridge for about the same as having someone rebuild one. If I can find a decent used one I might go that route, but hate to pay $1500 then have it die in 6 months or even 2 years.
Not going the DC route, almost the same cost, but then you have to upgrade batteries, solar, etc. I boondock too much and just want a fridge to run without killing my batteries, or even needing to run the gen every day. There is not a cost advantage of DC over a compressor fridge from what I can see.
Hope you find a good repair shop.