It sounds like what you could do is remove the entire light, measure the dimensions of the housing, then take the light & your notes, and go shopping for something that will fit.
If my memory is correct, the OEM bulbs are 37.5 Watts each. Inside of the power distribution box, under the hood on the driver side, there is a 15 AMP mini fuse which feeds the fog lamp relay. Based on the formula of 15 AMPs X 12 Volts, you should be able to safely run up to 180 Watts, or up to 90 Watts per side. In theory, if you find 55Watt fog lights that fit into the housing, you should be able to install them by splicing right into the factory wiring for the bulb connectors.
Of course I haven't done this myself yet, so I don't know if it will really work. Let's see what everyone else has done with their lights. I see a lot of photos of the lights, but no photos of wiring. I'm curious as to how they configured their wiring. The last thing that you want to do is install wiring that is not safe.