my short answer is Nauticat themselves. I have trawled the web and phoned and visited numerous chandlers/hardware stores etc etc etc. However storm hinges of the small size you probably require seem to be nowhere in the UK. So I contacted Nauticat with the exact dimensions and bought four. A word of caution, they are eye wateringly expensive and so is the postage. I can let you know how much if you want, but I would not like to spoil the surprise.
Sam Dalziel – Nauticat 331 – Dovetale.