What you are looking for is a bit scarce. I am busy experimenting with cables and have found sonarquest silver over copper to be very good and not just for their price. I have tried about 8 different brands and 3 versions of sonarquest female IEC. Go silver for sure.
https://www.sonarquestshop.com/silver-plated-c-1_15/
Perhaps contact these guys and ask for a male version Ag plated Cu.
I also have a missing-link IEC but no comparison done yet. UK based so might get lucky there.