PhilC sells a belted trenchcoat for Michael here in the Marketplace and at his site, PhilC Designs. I'm not sure that it quite fits your noir needs, especially in the style- and morphing-departments, but it's worth a look.

Ghastley has a free duster for Mike, but it doesn't include a belt.

Visit GreyLight and look in the Poser Archives; the headgear section has a "Jones" hat. It isn't textured, but perhaps you can adapt the textures/bumps from the Capone hat.