You know who's really good with Sunbrella and stainless steel marine tubing for extending the top, or making an enclosure, or something ..... is
www.villagecanvas.com in Meredith ...... plus, you will not pay too much money there for a real quality job!
Plus, winter is a good time to get it done. Tell him I sent you, and he'll double the price.
Your boat looks similar to the Dr. Hook sport fishing charter/Weirs Beach which got painted white over the Crestliner graphics maybe ten years ago .... take a look at his super set-up.