Well, if it helps, Cowboy Bebop is pretty solidly noir from a thematic standpoint, even if it doesn't have the distinctive visual style to it.  There's probably plenty of other things you could draw on for inspiration as well, come to think of it.<br/><br/>Though, speaking of The Big O, Schwarzwald's outfit is pretty close to what I imagine Ankhesenamen being dressed in, though she doesn't have many visual similarities to him, otherwise...