Where to go get Katniss clothes?

The character Katniss Everdeen from "The Hunger Games" series did not have any specific branded or real-world clothing items associated with her character. Her outfits in the movies were custom-made for the films based on the fictional world's aesthetics. So while there might be fashion items inspired by her look, there isn't an official "get the look" or a specific boutique where you can obtain her exact outfits.