I wonder, can he "upgrade" it to the old aluminum version??? Does it fit?Looks to me like you have an Ariens 01127300 sheave and need an Ariens 07217100 belt. Sheave may no longer be available. I would take the model and serial numbers to an Ariens dealer or good repair shop, they should ne able to identify them for you.
And that's why I ask being I am not a dealer.That’s why I suggested he go to a dealer or good repair shop.