I ordered mine from a company here is SC(they ship all over the country) for my Tracker 16.5 and it fits perfect. Thier website is
Boat Covers, Bimini Tops, Custom Boat Covers, Boat Tops. and they do a great job. You can call and talk with one of the employees for any questions you have. They have a selection chart and you pick out your exact boat and you can select from several materials and colors, plus mine came with a free boot cover.
Check them out, I think you will be pleased.
SeaRay
Mark 1:17 ...I will make you fishers of men