My 1981 Hunter 27' has two hatches that need replacing. Can anyone assist in advising where I might find the correct size, specifically the forward hatch which is trapizoidal, with the cut out size width ranging from approximately 19" forward and 20.5" aft (middle is 19.5"). The length (fwd and aft)is 19.75". I've looked on line and the "sailboatowners" chandlery does not have trapizoidal, and Pompanette has some but not the correct size. I would refer molded, with smoked glass. The other smaller hatch is rectangular and I think I have found a replacement at Pompanette.