Re: windshield replacement
That's too bad. Southern glass, here in Lakeland Fl., made a complete set of window glass, front and sides, for me, just from a template.
Of course, I had to be responsible for the fit, as the tempered glass cannot be trimmed.
I am not sure what you mean by "a rip off". If no one else is willing to do the work, and if they do a good job, that matches your template, then how can they be ripping you off? Them wanting the frames is a different matter. Are they local, so you could take your boat to them, so they could make the template?
I guess I am a "purist", I wouldn't be happy using Lexan and Polycarb will end up looking like the headlights on 8 yr. old cars -cloudy.