Agree with Pat and Tim.
Thrifty Mariner should be your first choice for replacements. Or for pieces/parts if you only need seals, lenses, dogs, etc.Your portlight sizes are the same as my H37C, 5x12 for the small ones, 7x15 for the large ones. You can check this by measuring from outside edge to outside edge of the "spigot", that thin frame that sticks out and gets broken when people step on them.Check the archives and photo forum for articles and photos about replacing them.