I have.
bought flat ally length from bunny's - bend into a 'z' shape.
this sits by the passenger's right knee cap, and the 'z' slots under where the centre console plastic meets the carpet, and back down between the carpet and the bare metal floor hidden under the console - if that makes sense.
screw unit to 'z' shape first. also use duct tape or similar around the top of the ally where it will sit just off the plastic, so any screws or the ally itself will not rub on the plastic - it shouldn't if you have bent it properly.
works perfectly.
whilst at bunnys, also get double sided industrial strength sticky squares - they are amazingly sticky and will easily mount the microphone to any dash surface you wish - vertical or otherwise.
zero holes...