Hi I am a new to me owner of a 1984 Ericson 30+. I am interested in replacing my forward and aft hatch lenses as they are severely crazed. I have heard that they were manufactured by Lewmar but dont have a part number to cross reference to find a replacement. Can anyone who has replaced theirs tell me where I might be able to find some? I do not want to remove the entire hatch to send out for rebuild. Rather I would like to remove the old and replace with the new while it is still on my boat. Any hints or suggestions would be much appreciated. I live near the San Francisco area. Thanks in advance.