Cheap, effective, and best of all EASY...
For some time I have wanted to add detachable power cord sockets to equipment without such facility. Until now, I haven't attempted it, mainly because I don't want to cut into a chassis to fit an IEC block.
Then, as I sat mesmerized by my Basis 1400, I glanced at the motor assembly, and voila! If you are familiar with the 1400, you probably know where I'm going with this already.
Get a female IEC -> male IEC "jumper" cable (Allied stock # 626-9981), chop off the female end, insert it into the chassis through existing power cord hole, and connect it up.
What you end up with is a short 3-5 inches pigtail coming out of the exisiting hole, with a male IEC socket on the end of it.
I am interested in this mainly for flexibility. Now I can use any length of power cord that I want when I move things around. I am no longer stuck with the usual 6 foot length.