Rick nailed that one Suncoast Porsche is great.
http://e-partssales.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=P&Category_Code=PO
The GT3 wheel is 695.00, GT3 RS wheel is 749.00 both require sport wheel airbag - call for pricing and info.....that always means bring a freight-car full of 20's....
I thought about the same, but after several thousand miles and a speed event in my 06, I have zero complaints on the stock wheel. It doesn't look real neat, but I don't know, it's just really comfortable and feels "right" at speed.