dieseldog, i recon you have problems with your focus cos the lowering springs that have been fitted lower more than 30mm. i have friends with focus who've used 30mm lowering springs (mostely eibach as they make the ford racing springs and so are ford approved) and have no problems at all and love them. with standard shocks i'd recomend the eibach 30mm springs and that should sort your problem out...unless yours has been too low for a while and fucked your shocks!

as far as shopping springs goes......for the love of god dont fucking bother. why spend decent money sorting your motor out to then ruin it by using chopped springs which are gonna be softer thn standard, ruin the handling and if they dont fit properly may dislodge going over a bridge and then cause a crash going round the next corner!!!