Not what you want, but a list of ships arriving by date can be found at: http://www.stevemorse.org/ellis/boatx.html?mode=ny
But this one should helphttp://www.stevemorse.org/ellis/boat2.html
but before you do that, check out the other utilities at stevemorse.org for Castle Garden. Are you sure they arrived in NY and not Boston or Philadelphia or Canada or ????