Ok, is the place where the power cord plugs in have two pins or three? All my monitors so far have had two.
If it is two, then it is simple. Basically all you have to do is cut open an extension cord, and make one of the wires go to one pin, and the other wire go to the other.
OR
I would have to see the place where the cord hooks up to tell you exactly what kind of connector you need. But chances are good that if you just measured the distance between the pins, then you could go to the thrift store and pick up a power cord that would fit. Check waffle irons and coffee makers especially, as they tend to have removable cords. Don't get any kind of cord with a brick on it, just a cord.