Looking for a good used racing seat

I'm about 5' 10-1/2", 170 lb, 32 inch waist, lean build, so something like a Sparco Evo or Sport 2000 (which I've sat in and found very comfortable) would do the trick, although I'm flexible as to brand. It's for my 92 968 which I'm turning into a mostly-track car. I won't be racing it immediately - only track days for awhile, and then eventually on to competitive racing, once I figure out how to deal with the logistics. Any leads on an affordable seat would be much appreciated. Thanks.