I bought my Z NISMO while selling one house and buying a new one with a few month delay. So I figured I might as well get a car cover. I got an outdoor one being:
Covercraft Evolution 4 Custom Car Cover with the Lock and Cable kit.
Cost me $222 shipped.
Covercraft Evolution 4 Car Cover - Reviews on Hail Resistant Evolution 4 Outdoor Car Covers
If interested I am selling it. Turns out the house I got has a garage so I do not need it. It was used for three weeks during the Ohio fall season. If interested PM me.