Although I can’t find them on their site, Waeco do truck fridges, that are like the original equipment. Probably make them for the manufactuers anyway.
I doubt they are cheap, but from experience I know they are good quality and good after sales service.
We had a 24v Waeco fridge in a race transporter, it worked pretty much constantly for the 5 years I worked there and when a bit was broken, by somebody being a bit heavy handed, despite it being an obsolete product Waeco put us in touch with a company that stocked the parts.