Make your own using a 2" ID tube that fits over the 2" hitch receiver. I see no reason for one that folds down as your planned usage of the spare should be none. At least you'll have the spare with you.
It took me a while to adjust my head to no spare. But no spare and no equipment to change it. My concern isn't changing the tire but the damage and potential accident if a tire blows while traveling. My Toyo tires are 5 years old and next month I'll be talking to 2 shops about them before deciding on another year.