Sure, Project Runway contestants frequently rummage through this 40,000-square-foot garment district institution for jersey and satin to use in their latest sartorial creations, but Mood has always been a resource for both serious and amateur sewers not on reality TV. Its expert staff will help you navigate the mazelike shelves for the right organza, grosgrain ribbon and coconut buttons for that look you’ve been meaning to whip up.