The control boards for the appliances are probably available from Dinosaur Electronics, don't have their URL to hand, do a Google search.
Also many upscale RV places and suppliers carry Dino stuff, you can get through them instead of direct through the manufacturer.
I'd keep the appliances, you know they work or are repairable. The RV itself is all stick-and-stapled 2x2 lumber with a 3mm ply interior and a thin aluminum skin. Salvage the skin for scrap, junk the rest, and see if you can sell the running chassis for a toy hauler....MAYBE save the cab area intact, close off the back of the cab so they can convert the rear area for a flatbed hauler.
Or sell it as is, dunno what you'll get for it.......
The tool storage is nice, but where do I put the bed?