We have a '07 Dolphin, and I just replaced the same hose. Ours was a corrugated white plastic that had become brittle and broken into several pieces. So, go to your local hardware store and purchase about 3 ft. of 1/2" INTERNAL diameter clear plastic tubing (I had to purchase a bit more, as it was pre-packaged).
Remove the drain catch tray which is directly under the aluminum cooling fins on the back, internal wall of your refrig. Directly below the tray is a small white plastic catch basin. Grasp it securely and twist and pull it until it comes free of the back refrig. wall. It has about a 3"X 1/2" O.D. round white plastic pipe moulded into it.
Now, take your newly purchased 1/2" I.D. tubing and push one end of it through the hole previously occupied by catch basin's pipe. Once you get a ft. or so through the hole, go outside, reach your hand up the right side of the refrig. enclosure, next to and about half way up the cooling coils, and grasp the new tubing. You should be able to pull the tubing through the back wall of the refrig. I routed mine as far from the coils as possible, as they get hot, and down to the small, 1/2" I.D. drain fitting on the left, bottom edge of of the refrig. unit. Do not attach the tubing just yet, but be certain you have it routed where you want it, and that it will at least reach the thru-wall fitting.
Go back inside, and cut the clear plastic tubing, giving yourself enough of it to grasp it, and push it over the pipe section of the catch basin. There are no clamps anywhere to be concerned about.
Go back outside, check the final routing of the new tubing, cut it off where needed, and NOW attach it to the thru-wall fitting. You're done!