Build your own. 13AWG is probably heavy enough. I’ve used this wire and it punches well above its price.
https://www.madisoundspeakerstore.com/power-cables/supra-lorad-2.5-power-cable-by-the-foot/
For plugs these are very good for the money.
http://www.soniccraft.com/product_info.php/cardas-3455r-iec-p-2109
http://www.soniccraft.com/product_info.php/cardas-3455r-male-ac-p-2110
https://www.madisoundspeakerstore.com/power-cables/supra-lorad-2.5-power-cable-by-the-foot/
For plugs these are very good for the money.
http://www.soniccraft.com/product_info.php/cardas-3455r-iec-p-2109
http://www.soniccraft.com/product_info.php/cardas-3455r-male-ac-p-2110