Not sure this is possible with just struts assuming you can find something that is not built to stock specs.
Suggest going to various websites such Summit Racing, Autohause and whatever else you can find for performance parts. Then call them to determine if there is a performance strut for your car.
If you want a start on gaining a sport suspension might look at with something like this, coil overs:
Ksport Coilovers - Kontrol Pro System - Import Replacement Parts
Take note, stiffer struts (and springs) will result in a feeling more bumps and potholes.
When your tires wear out, replacement with performance tires can make a big difference but typically the down side is they wear out sooner.