If I read your post correctly, you are not wanting to remove the hatches, just buy new lenses to install in your existing frames. If that is correct, several owners on this site (and in your yacht club as well) have carefully removed the lenses by cutting through the black caulking on the old hatches, removing the lense and taking it to a local plastics shop or perhaps even an auto glass shop where they can cut acrylic to size for you. There are choices to make about colour (clear, grey, smoked, light brown, etc.). The new lenses are best installed using Dow Corning 795 caulking, which seems made for this application. I had a local marine general repair person cut a 4 inch hole in the centre of my main hatch on my E30+ and installed a stainless steel Nicro solar vent, which has worked well for many years to increase ventilation in the boat.
I am not aware that Lewmar sells just the lenses for their hatches, so if I'm right, you would have to purchase and replace the entire hatch. In that case it might be cheaper to send them to Select Plastics who refinish hatches like ours to look like new, though it's not cheap and you had mentioned that you didn't want to remove the existing hatches from the boat.
Others may have additional or more up to date information, but this may give you an option to think about.
Finally, congrats on your E30+ purchase--we have had ours for 13 years and love it!!
Frank