The concentric pots are two pots in one (inner and outer knobs) that work independently from one another. If you used them, you could have one be for tone and one for volume (in your existing holes) but have separate controls over each pickup. The inner could be the bridge and outer for neck, or the other way around... your choice. You could also use one set for the bridge pup (inner volume/outer tone) and the other for the neck. Either way would give you the controls you're looking for without the need for drilling or routing. It would, however, require a complete rewire.
Push-pull pots have a 2-way switch attached to a single pot that is operated by pulling up (or pushing down) the knob. Usually used for coil taps, phase reverse, or on/off. Not really what you are looking for, based on your request.