Try shockwarehouse I got my Bilstein Sport Shocks at them at a reasonable price.
Btw, I was reading your other post about shocks and springs, just FYI, It would not affect the height of your car by changing shocks, lowering springs like the one you have dictates the height of the car.
You can upgrade your OEM Bilstein shocks with the Bilstein Sport to match the H&R Spring set-up you have in your suspension system.