I saw a guy with one added to his hood to make it look like the WRC one. I just cant seem to find it at all. Does anyone kno where you can get one? Here is the Focus with it. http://www.cardomain.com/ride/641526
If you want just the looks of it, I'm sure you could find the same (or similar) scoop on eBay that installs with an adhesive backing. If you want true functionality as well as looks, you could buy the stick-on scoop and cut holes into your hood, or you could try for a CF hood that has a similar appearance.
I'd be wary about buying an entire hood from eBay though. Here are a few items I've found that you might be interested in.
the WRC hood vent, is a fiberglass replica.
It is made of good quality. I have seen it in person, and it has no imperfections.
it's a european part... you'll find it ebay.co.uk.
(I searched, and found none, BUT they do show up from time to time)