Hi there
We had this same problem when a front spring on our Sport broke, £275 for a pair of front springs!! Stupid if you ask me. Anyway a company called Envy Performance in Northumberland can get either RSR or H&R performance lowered springs for this car. The H&R items we fitted not only retained the original GS300 Sport ride hight but has transformed the ride and handling from being harsh and skippy to complient but firm. It handles better to boot.
The RSR are £180 and the H&R are around £230, both prices are for a set of 4.
Have fun
Regards
Martin Foreman
