I have to chime in here, as I had to do this to my 2006 about 6 months ago. I bought the Dorman part to complete the job, but actually ended up using a Toyota hose to fix this--with the clips from the dorman hose. (I think someone mentioned the Toyota hose in the FocusFanatics thread)
I did in fact remove the intake and replaced the gaskets. It took me a couple of days to complete this job, as I was trying to be careful not to break any plastic parts, even though I accidentally broke the fuel pressure regulator trying to get the intake manifold back in after cleaning it.
I did not change the PCV valve or thermostat or hoses, which I should have but I got pretty frustrated with the whole thing, and just wanted it to get back together. If have bigger hands, so I had trouble reaching into the tight spots, even with the throttle body removed. You will need some long 1/4" extensions, and I also used a long "grabber" tool to make sure I didn't drop the intake manifold bolts.