you can get the OEM one, but dont let the dealer install it.. They put a small D ring and screw that through your Gel Coat, which is not cool. At that point on each end are 2 straps that strap down from the bimini to the deck of your boat. I would like to replace the straps on my bimini with aluminum rods that connect to the tower like the rest of my bimini. Its also more rigid and dont have the gay straps hanging down..
Building a bimini is not rocket science. I built my own on my previous boat and loved it more than any off the shelf bimini.
This is a pic of the bimini I made that covered the entire cabin area of the boat. EVERYONE got shade, not just the driver and whoever was sitting in the front