I'm not sure on the possibility of your suggested repair, but when I last changed my spark plugs I completely forgot to plug the front coil pack on cylinder 4 back in. I did not notice, the car ran great still, I drove it like that for months before I scanned it with an OBD reader out of curiosity when scanning a friends Mini R50, saw the code, pulled the cover off the top and saw it unplugged. It sounded fractionally smoother once I plugged it in but it was by no means misfiring.
Long story short, you'll probably be okay to drive it for a short while on one spark plug