The AMC series "Mad Men" has been honored for its sharp writing, polished acting and engaging portrayal of life at a New York advertising agency in the early 1960s. It has also been much noticed for something else: its fashion sense. The series, which features all the looks of that era — thin-lapeled suits and skinny ties, crinoline-puffed dresses and pencil skirts, Peter Pan collars and subdued pinks and greens — has attracted attention from fashion designers and clothing merchandisers