I have only seen it on ebay. It has been three years since I seriously looked, but I did find four different Corvette fabrics on ebay at that time. I did find a Route 66 fabric at Hobby Lobby, which they still have. Some of the cars in it were Corvettes, and they had it with two different background colors.
Good luck. I think I will try to find some online now, just to see if I can.
Dina