I don't know you'll have much luck on that score. Have you lost your hatch then? Not too hard to make one and loads of ideas and designs if you google it.
Moulding a GRP one is not too hard either once you have made a mould or possibly buy a grp one from a boat builder who moulds hulls and topsides?
Or design your own in aluminium and get a fabricator to make it for you?