Just bought an Antec 620W 620C continuous power supply off of Amazon, and it did not come with a cord that leads from the PSU to the wall socket. Was it supposed to come with one?
You can find much cheaper ones than that, i just picked that one so you know what end to look for. The cheapest option would be to ask a tech savvy friend if they have a spare, i have way more power cords than i have devices at this point since every monitor and desktop and most power supplies you buy all come with one.