You can buy 1-2 meters of Oyaide Black mamba V2 or Furutech cable from ePay (from sellers out of Japan, doubtful it’s chicom counterfeit stuff) for $70 - blood plasma.
Plugs? Oyaide P-029 runs around $70, higher-end Oyaide or Furutech double that to first-born.
IEC end ditto.
Or you can spend your grandchildren’s inheritance on ready-made cables for $$$$$ prices.
I bought some Belden wire, Oyaide plugs and am happy enough with the results with a TEKTRON TK2 2A3/50I-S running EML 300b tubes. Still contemplating the Black Mamba stuff just ‘cause I like what I’ve read about it and, well, my inner adolescent says it sounds cool.
YMMV.