I bought the dishwasher used and the hoses had been cut off so they could plumb it in direct. I was able to easily find the part I needed and order.
I had read that another person had managed to install the hose without removing the cabinet. That's what we did. I just pulled a piece of string through with the old hose when I removed it, tied it to the new hose and that helped snake it down thru the cabinet. It took about 15 minutes or so start to finish.