I'd sell all 4 of my '99 Z28 leather seats if you're interested. They're dark grey w/ a power driver's seat. The driver's seat would need a new cover though. The bulster area of the upper is worn and the lower is torn (from when it was in a shop

). I'd sell the whole set though if you're interested. PM if you want to talk details. And no, I haven't researched the price of the cover for the driver's seat so you may wanna look into that first.
I had planned to get the seat recovered then put 'em on Ebay or something. But if you'd like to buy 'em all and do the cover yourself I'd obviously adjust my price accordingly.
-TJ