extension ring for 1.4 teleconverter

I finally am going to get wet again. its been a long time. Im going to my beloved channel islands here in sunny ca. Any aquatica users know which extension ring to use for adding a 1.4 teleconverter, to use with a wide angle port for 10.5 for close focus wideangle, and id like to try adding to a 105 macro port. Thanks