I tried 727-576-8577. Recording said he was on the other line, so I assume it is an operating number. When I bought my '86 3607 last October, some previous owner removed the opening ports and permanently sealed them with plexiglass. I thought that was a dumb move, but one of the guys at the yard where I had the survey and service work done, siad the original hatches were so leak prone that I have moved port replacement way down on my list. My thinking is that at the dock we will user the AC and anchored out the boat will be pointed into the wind and the forward hatch and rear hatch will provide a decent flow. I will probable replace them someday but will probably go with a better port even if it requires some cutting. It's never easy(or cheap). Good luck.
Jimmy