Case fan nets?

[webdesigncut]

Hello friends,

I want to customize my case and add some fans on top so i would like to know are the nets that are used on cabinets like cooler master haf 932 available .
i actually dont want the fans to stay exposed
Looking for advice

 

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Metal net like this?: http://static.techspot.com/articles-info/133/images/Image_05T.jpg