On my older 75 Catalina 27, the forward hatch is one solid piece of fibreglass. I would like to some how modify it to take lexan to let the sun shine in, and shed some light in the forward black hole of Calcutta (V birth). I know if the hatch were flat, it wouldn't be a problem, according to the book - "This Old Boat" - but what can you do if your hatch is not flat but curved?Is there a commercial hatch available as replacement?