Hi lds iv got a set of bilstein 909 shocks for the rear of my Focus Cosworth . there for a sierra cosworth which is spot on as the Focus is moded for them . Tony of Touring Car Spares has been a top man and sorted all the parts i need to make them work But the only thing Tony cannot help me with is the springs for them and iv not got a clue on wot size/length/O,D and wot . lbs spring i need or were to get them from can any one help me out with any info on this please