On a whim I bought an IEC connector and plug from Amazon. Needed a power cord.
Monosaudio is the brand (made in China)
Damn these are nice quality product. They offer bare copper, rhodium plating of the copper, and gold plating.
My thirty plus years around plastic injection molding says the bodies are polycarbonate. The internal wire clamps are robust. And the design basically has a built in strain grommet.
I have zero affiliation. Fully retired