Where can I buy a car cover for a 2008 imported Mazda 3 Sport? Can anyone help me out?

I have a car cover! The car owner didn't want the car cover anymore.

You're referring to the type of car cover that goes over the outside of the car, right? You can actually buy a universal car cover for this size (4415/1745/1465mm) sedan. You can also try searching on the popular online store for a Mazda 3 Sport edition specific cover, but since this model is quite old, there might not be a specific one available.