It seems that the Street Edition supsension is exactly what I'm looking for (front: 1s4z18124ba/motorcraft aa595 and rear: ys4z18125da/motorcraft aa465) but I'm not sure if they'll fit on my 03 zx3.
As I understand it, European cars, as a whole, offer a harder suspension, making for a less "comfortable" ride (by our standards) but increasing handling in exchange. The Street Edition Focus has the same springs and dampers as the european Foci, making for more responsive [i guess] handling.
If you can track down the part numbers, probably through any dealership. But I'd just get the SVT suspension kit since its better, and you can get it through a Ford Racing distributor, which means it'll be cheaper than the Street Edition suspension components as purchased at a dealership.
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