Sounds like you need two FRONT tires so buy two new Michelins of the same size. Put one of the takeofffs on your roof wrapped in alum foil and plastic wrap and hope you do not need it. It will ride around a roof vent in the middle of the roof without being tied down BUT you need to put a short piece of hose under it so you do not create a damn that will put water inside. Yes I learned that the wet way.
If you were replacing all of your tires then I'd disagree with the above posts as I've had good service from Hankook. This way you have a spare of the same size for a trip where you could be a long way from a tire of the correct size if needed.