Mannequins sporting colored wigs and wearing torn shirts, tartan pants, hardware-embellished dresses and trash bags line the walls; accompanying them are sound bites and video clips of Blondie, the Ramones, Sid Vicious and Patti Smith. This is the set-up for the Metropolitan Museum of Art’s latest Costume Institution exhibit, “PUNK: From Chaos to Couture.”The exhibition takes a look at, and focuses on, the do-it-yourself aspect of punk fashion and how it influenced high fashion.