Re: Looking for 'classic' style bimini top...
The snaps on the windsheild slide so you can adjust, at least they do on mine. Either a boat junk yard or search long and hard on CL and you may get lucky. I've seen a few in the last year.
My top, convertible, was failing pretty bad and I ended up cutting the center out and saving the outer 2". Then I cut some new marine vinyl to fit the old and sewd them together. A little tricky and not original restore, but it sure keeps the rain and sun out.