The idea I was going for...
was to order the 12 VDC outlet with cover from a Mazda OEM parts department (ie. Mazda Online) and drill into the front-center console, to the left of the Aux1 jack and mount it there. The trouble is, the wattage you want to run out of this outlet. I think a cell phone is fine, but plugging a AC power inverter, might not be a good idea. I was going to splice into the interior light harness or the radio. I haven't located either of these wires yet, but will and take pictures of the project when I do. I have had the cup holder and power outlet panels off... it was not too tricky. I believe there is space for the new outlet there.
I will post more pics/wire diagrams in the next few days, if I find something on it.