I found Partzilla is about 10% to 20% lower on OEM parts and after a $ amount its Free shipping. Aftermarket I don't know, why would you need to mod these machines. It does' anything I task it with , Plowing snow, Track system, Hauling wood, broken down sleds-4wheelers, and a small car lost following Google maps..... They were A Dumb Ass!
It just about the perfect ORV and I've owned a bunch of them.