I need to replace the clamshell-type vents on the port aft side of my 1976 C22. I believe these were standard equipment on the older boats. Unfortunately they are no longer available and the current ones now meet new Coast Guard standards and are too big to fit in the available space. Has anyone on this forum removed the vents (for whatever purpose), and would you be willing to sell them? Or might there be someone who is parting out his boat? Any help would be appreciated. Thanks!