I'm pretty sure Rob has Eibach coilover front & rear, their springs are not normally known to fail.don't know what brand you got but if both springs have gone just get a new set preferably from a different brand... as these clearly aren't fit for purpose. My previous vectra c was known to break springs i searched until i found a brand that had the same spring rate for the car but didn't break the springs... i ended up with TA-techniks lowering springs and sport shocks on that car... they lasted until the car went to the scrappy because the engine seized (runaway turbo). they were on the car for over 6 years and still looked fresh when it went to the scrappy.