Mr.Hunters, boatersworld carries these
http://www.cesmithco.com/product/ttop.htm
also use the link on the side of the page,dealer in quincy listed. He has a ad in offshore magizine or the fisherman for a hundred dollars of installed top I belive.
Just was at Boatersworld in warwick RI. they have a T-top displayed in the store.
Mike