Hi OtterMN,
By "white, and corrugated" I'm assuming you mean it has a white nylon reinforcing web in the clear plastic. You may be able to match the hose size at a local hardware store, or a marine store, or perhaps at an RV dealer. Or you can call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready.
Do you have any idea what caused the hose to rupture?