Sometime back someone wrote that they had the lens in some fixed ports replaced by a company called Select Plastics. Does anyone have a contact telephome number or e-mail address for this company?
I found Select Plastics a few months ago. I'm not sure about the fixed port replacement, however, they do repair/replace lewmar hatches at a very fair price. The website is www.selectplastics.com and you'll find the telephone number on the web page. Good luck.
