Right, gotcha. I've got some old Phillips cctv
cameras that get their power from the monitor and I'm finding it damn near impossible to find a monitor that will run them. Looks like I'll have to figure something else out instead.
The easiest and cheapest solution (if you know what your doing) is to open up the camera and separate the power circuit from the video input and either have a lead coming out or put a little socket on the case (if there is room for a socket).
You need 12V 500mA supplies for each camera (or if running them all from one location then a single 12V with half an amp per camera).
I most probably can do this for you if you need (free other than parts).
Alternatively it should be pretty easy to build a phantom power adaptor for the other end of the cable costing less than a fiver for parts (per adaptor - depending how pretty you want it) plus cost of power supply.