I recently swapped out my Groco EB head for a composting head and I’m offering it up to anyone willing to pay the shipping.  I rebuilt the bronze head body when I restored my boat in ‘12 and put in new gaskets and joker valve and put on a new seat.   The bowl is still in very good condition.   The weight is about 50 pounds packed.  Contact me at tkoehl2769@gmail.com if interested.