A San Franciscan looking for, say, a gun necklace to accompany their VP candidate Halloween costume will be happy to know they can find one that was created without leaving a trace. The Appel & Frank Eco-Chic shopping event on Thursday evening at the Regency Center combines sustainable apparel, jewelry and personal care products. Notable vendors include organic and recycled jacket designer JulesElin as well as area winery 7 Daughters. A portion of the proceeds go to Friends of the Urban Forest’s efforts to plant and care for groups of trees in city neighborhoods.