The thread title pretty much says it all. I'm a new Nauticam owner and would like to defer buying a new dome port while my savings account recovers. My Nikkor Z 14-30 will not fit through the Ikelite port extension, so I can not use the NA-921303 four lock adapter. I am pretty sure the 82mm-diameter lens will fit through the Nauticam adapter. Nauticam says they stopped making this adapter a few ago. Any offers or leads on one would be very appreciated.