Hi, try "Red Brass" You could probably make some if you have a melter.
Phil
UK
Gunmetal, also known as red brass in the United States,[1] is a type of bronze – an alloy of copper (88%), tin (10%), and zinc (2%).[2] Originally used chiefly for making guns, gunmetal was eventually superseded by steel. Gunmetal casts and machines well and is resistant to corrosion from steam and salt water,[3] and is used to make steam and hydraulic castings, valves, and gears, and also statues and various small objects, e.g. buttons. It has a tensile strength of 221 to 310 MPa, a specific gravity of 8.7, a density 8,719 kg/m3, and a Brinell hardness of 65 to 74.