I have a Sundowner Seat for sale. $170 shipped to the lower 48. The seat is very much like new and the Part Number is 51813-09. Really, really a nice seat and very comfortable. Way better than the stocker was.
Yes, it does have studs . . . travelling today but I will PM you a couple pics when I get home on friday. I don't have the pics on this computer. Thanks for your interest.