i am building a Pax 18 from a 2005 kit that was given to me.  The hatch cover that came with it is missing the cover and just has the ring and wood escutcheon, no cap. Where can I purchase a new one?  And see details on how it is installed?  I considered doing a flush mount that I have been seeing here but with the spine running down the center of the deck I don’t feel comfortable doing this  Any suggestions?