This is a beautiful set of hardware we just installed. We ordered it through our local hardware store, but called up the manufacturer first to figure the right configuration. They provided us with the right item numbers to order.
Of course they come in different finishes and different details. we chose in this case square mounting plates and a satin nickel finish.
"These stylish door levers and rosettes are constructed of the highest quality materials and cast into spectacular modern designs. Lever and rosette assemblies are provided for both sides of the door. Each lever and rosette is hand polished and expertly finished. Available finishes are Satin Nickel, Polished Chrome, and Oil Rubbed Bronze."