Having owned a CSY 33 with them I can say you won't find them any more. You may require re bedding and you may require new rubber seals. Tampa Rubber used to be able to make them. The ports should be possible to recondition. They really were bomb proof.
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Are you trying to replace them or service them. If you are trying to replace them I suggest contacting New Found Metals. I have no association with them other than a happy customer. They seem to have stock of a lot of ports.
i am looking to install them in existing dead-light locations, Yes i have some on order from newfound metals, but they are not available in bronze. They are also not available till may or june! I would prefer bronze to match my existing Perko portholes; but i'm no stranger to compromise...