I don't know if you have a Dometic or a Norcold, but on a Norcold you should be able to feed a new hose out from inside the fridge. It may take a couple of tries to get it aimed downward to go where you want it.
Take out the top shelf, if necessary, and remove the drain pan. You should be able to see the hole.
Our hose didn't break, but it became disconnected from the drain pan inside the fridge and it was pulled through the hole far enough I couldn't reach it. I pulled it out from outside, then fed it back through the hole from the inside.