Traci3b,
I have an 06 SV230 with the evolution tower and incorporated bimini. I have had good luck ordering parts from Shel at Centurion. Below is a youtube video link of the exact tower I have. The Bimini is installed on the tower, not the boat. I would suspect that each and every part can be ordered. Anyway It might give you an idea on what to look for. It was two years ago when I was searching Centurion for a couple of the parts incorporated in this top but honestly all I remember is I spoke to Shel at Centurion and she was able to look up part #s diagrams and had the parts shipped right away.
Last season I talked to the Evolution Tower people to get a price on surf board racks as mine are made for wake boards. I did a search now and cannot find a link for them. Not sure if they went out of business or not.
Here is the youtube link that shows how the top is incorporated into the Evolution Tower. I would send you pics but my boat is 1500 miles away right now. Good luck.