When you say power cables, do you mean the power cord that connects the display to the power outlet in the wall? If so, you can find one at a computer store. Most flat panel televisions/monitors use a power cord with an end similar to this:
It will plug into a socket on your panel similar to this:
The other end is a normal 3 pronged plug that goes in the wall.
In some cases, the smaller panel like you have may have an external power supply which may be more difficult to find. Again, a computer store might be able to help you there. The power supply may look something like this: