Hi ming321. Sorry I am so late, but I just discovered and joined the forums today. I purchased a great car cover for my 2001 Cougar when it was new, from California Car Covers (
www.calcarcover.com ). Still use it, and it works great.
Just got the MKZ, so did not buy one for it yet. For the Cougar, I purchased the "Superweave" fabric, as it was the best for outdoor use at the time. I just checked, and they do have covers for the 2006 and 2007 Fusion. Take a look and see how you like the choices. Wherever you decide to buy, do yourself a favor and don't buy a cheap cover. It will scratch your finish, and not be worth the trouble. Remember, you get what you pay for.
Good luck.