IMHO while the rest of the Westy interior is a thing of beauty, the 3-way fridge is a complete PITA to keep running all of the three ways and after all that hassle, its tiny.
I think I'd prefer to rescue the stove/sink from a vehicle that somebody is parting out and build that into a custom cabinet with storage underneath and put a modern 12V fridge elsewhere.
Something else I'd try would be to adapt a lid for a scepter water can to feed a water line from the can to the sink using an electric or manual pump. That way one could take as many water cans as needed, stash them wherever and keep the live one plumbed in next to the sink cabinet.
Having said that, my home-grown campers have used plastic drawer units, one with a standard double burner propane stove on top, a washing up bowl and one of those blue 7 gal. water cubes. The plastic drawers break after a while but the whole setup is very light and very cheap.
Cheers,
Graham