I think that it will also exist in the US, I don't know the exact name in English, but I have seen it quite a lot in harbours in the Mediterranean. There is a kind of cheminee or high tent that occupies just the forward hatch space, and that you hang using the jib halyard. It covers all your requisits. In French the name is "manche �air pyramide", and you can see it in this link:
http://macgregorsailors.com/phpBB/posti ... ply&t=5974
