So you would like to give your workshop or home a more steampunk look? This Quadruple-gang Steel Light Switch Cover with copper handles is worth a look. It is made of 1/4 inch raw steel with a rugged industrial look. Its lever system has a nut & bolt design that allow you to adjust the amount of torque needed to turn your lights on/off.
According to the maker, this design is only compatible with toggle switches at this time.