my 2 bobs worth - DONT buy a 'smev' stove - mines 6-7 yrs old and the gasheads in the elements are simply sitting in place because the substrate they were attached to has completely corroded away. Parts support is non-existant. Very disappointing.
Another option is RV stoves... or replacing your burners with those off a propane cooktop.... which are cheap. Obviously you would need to work out the details for that. RV stoves need to be just as safe as boat stoves.
__________________ "I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard