I've been engraving and silversmithing for the Rev War reenacting set for 30+ years - making silver belt plates, gorgets, etc. and enlisted brass belt plates. I've been using common commercially available sheet brass which is of course hard has $#*! being copper and nickel. I'd like to step up the authenticity of my enlisted plates to a new level. Does anyhow know where I can get soft sheet brass in the correct early alloy (copper, tin, and maybe a touch of lead)? Approximately 16 gauge would be perfect.