Lewmar Hatches
I did four of my hatches last spring. Got the new lenses, new gasket, and good instructions from Select Plastics in Connecticut. They were great to work with. Even converted the two lenses that had glued on handles to add holes and provide bolt on handles like the bigger hatches, and new gaskets for under the plastic parts. I will try to attach the instruction files onto this email. If it doesn't work email me at mulf at live dot com.
Should have added that I found that soaking all aluminum joints with PB blaster to free up accumulated salt and grime to be a big help. Also soak the pins that come into view as you pull apart. Actually used a rubber mallet and a scrap block of starboard to get the parts moving apart. The first one was the hardest, the fourth was easy. The smaller hatches had a slightly different roll pin that took a little investigation to figure out how it came apart. Also, be very careful to watch how each part is positioned as you take it apart, so you can put it back the same way. Finally, the Lens Code is actually under the rubber gasket, near where the arrow points, and you have to roll the gasket back to find it. That is the Lewmar code for that exact size lens.