POST concept store with black dress Aurelio Costarella couture gown "Black Widow" $5,500. Marble, veiled Madonna bust from Italy $395. Pendant lights by Illumination. As well as eclectic homes wears, POST's concept store stocks high end fashion with Costarella's ready-to-wear collections and couture gowns made from imported silks, light-weight cottons and delicate hand knits.