OP, have you seen these sunglasses:
Marc Jacobs Sunglasses MJ252/S Black
http://en.designerseven.com/sunglasses/marc-jacobs-mj252s_12876.html
http://www.visiofactory.com/en/sunglasses/2626-sun-glasses-marc-jacobs-mj-252-s-807-lf-black-and-silver-shading-lenses-827886558810.html

They look very similar.