Replacing that 1962 a/c unit?

[Redcoat]

Dear Airstremers, I purchased an have a 1962 Tradewind Yacht 24’ last year. I decided to go at it recently and it’s totally gutted (apology as some preferred a different term) with only the outside shell left to be removed. Then, the frame, axle (single) and wheels will get restored at a local place. Meanwhile, as much as I want to keep the outside on its original stade but restored, this old a/c got to go.

The question is what to install? I would like to stay away from all RV’s conventional white plastic unit. I am open to any suggestions.

Thanks You in advance for sharing your expertise...
Andre