I'm pretty sure that it was built to fit the FRPP head. In order to fit it to a stock Zetec head, you have to add material to the mounting points and re-drill them. McNews Automotive can do it for you. They can also modify it for a Focus throttle body. (The intake was built to use a 70mm 4.6L '96-'01 Mustang Throttle Body.)
Have you checked out Steeda, NewEdgePerformance, and McNews? I doubt that they are all out. Plus there are a couple eBay stores that have them all the time.
Also, putting the intake on a stock head will only help a little. It would be best to pair it up with either the FRPP head or the FocusSport/Cosworth head.
BTW, good luck with the boost. Keep us updated.
Later,
BP