Eibachs are the Ford (UK) recommended springs. I've got a set (just arrived) going on soon, so I can't comment as yet. But they are supposed to lower about 30mm.
Try Ford Parts UK (This is a link to their Ford 2008 parts
http://www.fordpartsuk.com/shop/ford...008_parts_339/fordparts uk)or European Parts in Germany
http://www.european-parts.net/catalo...x.php?cPath=58, rather than locally - a little wait, but cheaper than buying locally, even after shipping.
Just make sure everything fits. Some things are compatible with 2005 Foci (LS/LT for us), some things only fit what they call the 2008 "Facelift" model (our LV). I've found out that the hard way recently...