Where can I get plastic frame with silicon nose pads?

[glasses store]

Plastic eyeglasses frames are light and comfortable to wear, especially those black ones, many girls love them, someone even where frames only, but I need lenses actually, but I don’t like its nose pad, I have a pair before, they can easily slide down from my nose, as this kind of frames are always made by a templet, thus the whole frame is made of plastic materials, including the nose pad, so where can I get plastic frames with soft silicon nose pad?