You got me. I was so caught up in my own evolution that I have just completed, that I didn't comprehend the question. Maybe I can redeem myself. If its just the flat Lexan that goes on top most companionways. Its pretty straight forward any glasier should be capable of replicating it. To do it yourself. Cut out the same shape/size hatch, the radius of the edges can be accomplished with a router, you need a sharp cutter and a mist of coolant to prevent smearing the material and then polish this edge with a cloth wheel and rouge. I hope that helps...