I bought the Koni shocks from koni-na.com. I think the price was arount $215 USD plus $15 for delievry. Their site has an application guide.
I like the Koni's so far. The rear of my car has a lot less movement. I supose I was accostomed to the rear moving around quite a bit. On turns it seems tighter and cornering is a little flatter which I like very much. The switng axle design and worn shoks are not a good combination for aggressive driving into and out of turns.
I have my shocks set at the mid point or 2.5 turns. I think that translates to 20 to 30 % stiffer. Tosh, how are your rear shocks setup.