Ideally the car wants setting up on a Flat Plate, or, at a Vehicle suspension geometry specialist, most towns have something, you may need to do some asking around locally, to see who's best for the job... sounds daunting and expensive, but its actually not, and well worth every penny
To be in with a fighting chance, you need to optimise what you already have, ie, make sure all other components are at their best, any worn suspension parts should be changed before, the car is set up, and yes G60 top mounts are a good place to start, as well as having all 4 tyres with uniform wear...
Setting up properly, will extend the life of the tyres, and make the car more rewarding to drive
Thom