Need source for high current HP type (with dimple) 14 or 16AWG 110vac power cord

The Aussie/OZ site that I first found info on them from calls them heater cords, so obviously they are in common use where a removable cable is needed on a high current device/appliance. Of course everyone has their own odd plugs to go to the power receptacle, go figure. I'd really like to find an attachable (screws/solder/etc) type to put on my own cable and I could even wire this to a disconnect/safety box on the wall and make it doubly safe. I'm running the server with one of the 410 watt redundant power supplies out right now as it's not need yet and saves the curent draw from 12 amps down to 8, making the 18 AWG cable safe since I heated ina groove with a soldering iron and then trimmed the melted flash off t he sides of the groove.