wheelenhancement.com and tirerack.com sell replica 17in. turbo twists that I believe are made for the early cars and do not need spacers (I could be wrong though). I think the 18" and genuine Porsche wheels need spacers.
http://www.wheelenhancement.com/Technology.htm
I know the Fuchs are lighter/stronger, but I honestly hate the way they look. When I first saw the turbo twists on a 993 I thought they were the best looking wheels I'd ever seen. I think they look great on the older cars too. Just a matter of opinion.
I think twists will be my next upgrade. Please excuse my quick and dirty Photoshop mockup...