Check out Tousley Ford Parts depot under the Ford Racing section, chassis, suspension - Focus.
the top two part numbers are the ones you want.
Part # M-18000-ZX3B
dont worry about it saying fits 05-07 focus, it also fits our generation of car.
I have been using these parts for 8 months / 22K miles now with no problems.
Just make sure you get the "3B" parts as they are the ones that fit.
It even looks like the price has come down a little since I got my parts from there.
^^^ The biggest problem with our 2nd gen cars is there is a big lack of choices when it comes to replacement shocks/struts. The other problem is that the sportlines are a soft spring and they drop 2"+ and they will destroy most shocks quicker then other springs on the market.
off the top of my head, i know the FRPP shocks will work but I don't know for how long.
as to other parts you will need that really all depends on your car, you may end up needing camber corrections both front and rear.
In the front you would need camber plates for the strut mounts and in the rear you might have to install camber shim plates, adjustable upper bolts or adjustable upper arms. Its impossible to tell as all our cars are a little different and not every car needs them.
Hopefully someone with more suspension knowledge will pop up soon.