Cape Dory Bronze Portlights
I can''t help with the portlights, but maybe with the Cape Dory e-mail list.
Go to "Community", click on "e-mail lists", choose "C" from the menu then scroll to "Cape Dory".
That will bring up the instructions. You "join", and you will get an e-mail confirmation from the server that you MUST respond to.
Thereafter anytime any member posts a Q or A to that address, you get copied via e-mail. Some of these groups have sparse comm. Your post here may pay off just as well.