I have a brand new in the box Beckson port light I never got around to replacing. It is the large 7x14" version. I bought this as an exact replacement for my Mainship 34 MkIII. They were used on many others as well. THIS IS NOT THE MODEL THAT REQUIRES CUTTING SLOTS IN YOUR WALL!! It is listed on Ebay, see link below.
Starting bid is only $100!
Beckson Marine PO714DWC10 PORT OPENING WHT/CLR 7 X 14IN