Hi FastGnat,
You'll do better to call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready. Ask for the parts dep't.
If the damage was caused by a tire blowout, you may want to replace all of your tires as they're aging out anyway. Also, when you lose a tire, unless you pull over right away, the surviving tire on that side is carrying twice its normal load and may quickly develop internal damage.
If by chance you have Towmax tires, don't go anywhere until you replace them.