There is only one way to get genuine Exmark parts, from an Exmark dealer. Along with our parts you also get our backing of the parts, qualified dealer installation (if you choose to do so), our guarantee, local source for parts (dealer), guaranteed parts overnight if you so desire, and technical support from your dealer as well as our factory personnel.
We can't speak for or against the quality of aftermarket parts but we can speak for ours. We stand behind our replacement parts just as we do our lawnmowers.
You can't get that anywhere else. That may or may not be something that has value.