I’m gonna echo what WallyC said. I also purchased a custom hatch from Fishon Fabrications. I believe it was 14x18” and ran a little under $200. But it is beautifully built and heavy duty. Well worth the money in my eyes. 1/8” aluminum and welded seams. It came with the hinge marked out and a hole drilled for a drop in handle. If I need more hatches done, I definitely won’t hesitate to go that route again. Might is mounted right under my feet at the bow and is much sturdier than the rest of the hatches in the boat.