A replacement hose wasn’t available, but an entire replacement assembled sump, pump motor, and other components was. For $250 including tax and shipping , I basically replaced every moving part on my Kenmore Elite dishwasher. Replacing it took me a half hour tops.
Take pictures of what you are tearing apart to ease reassembly. Clean all gaskets and mating surfaces thoroughly, and I recommend using a conservative amount of silicone grease on o-ring seals.