I saw those too. It is a universal setup, so I doubt it would fit without some custom fabrication. Plus, unless you can find a muffler shop to do it for you (cuz they most likely will not), it's going to be a DIY job.
Plus, the cats are built into the Y pipes and on the Gen 4s (I know mine at least) I have 3 cats, 1 after each cylinder bank then another after the collector and THEN the resonator on top of that. My exhaust system is clinched up tigher than a 12 year old's butt-hole while at the Neverland Ranch. Yeah, new a new exhaust system from the CYLINDERS back. I'm sure there's a better way than Fords way.