I have to say if I was faced with your issue, I'd go with a new residential unit, if I could find one I like that fits the coach. Due to space limitations, sometimes its hard to get a residential unit in that you like.
My second choice would be to replace the cooling unit if the cabinet, doors and racks are in good condition. You are going to have to pull the unit out regardless of which way you decide to go, so might as well just recondition the unit.
Absolute last choice would be a complete new absorption refrigerator. That's big $$.
2005 Newmar Kountry Star Gas 3742, Workhorse W24, 8.1L/Allison 5-spd
2017 Grand Cherokee or 2017 Harley Ultra in tow
JT, Em & the boys, Kong & Baxter (rescued grey tabbies)