If you ordered from Granger, I believe you can get Goodyear "instapower"belts from them.
Those Instapower line of belts, are designed for 1/4 and 1/2 twists and back side idlers found in farm & lawn equipment.
I personally prefer them to all but factory oem belts, as they last a long time.
I tried a blue tractor supply belt once, it lasted about 15 minutes.
Good part of that is, they cheerfully refunded my money.
