We have a 4100 SCB but the front windshields look like they are the same. I have washed our windows many, many times, and I don't know about them being curved. Did you confirm this. I am going to check mine tomorrow when I go out to it!
Whether they are or not, go around to all of the boatyards in your area and ask them for a bid. The place that we haul out and have the bottom painted has all kinds of connections for everything imaginable. We had two windows replaced by them. (I have also found that as soon as you say "for a boat" to people who donít normally work on them, the price goes up and up.) I know the back window is expensive and curved, (one person that had to replace it said it was about $5000.00,) but the front one, in my opinion, should not be. Either way, check at all the local boatyards. They are used to fixing all kinds of things for the insurance companies. Also, if you are going through insurance, see if they have a "go to" boat yard. Good luck!!