Funny, I passed right by South Bend a day before getting home from the cross-country trip. A day or two after getting home, I checked TireRack's site to see if they had a winter tire-wheel set (no) and called. They told me the problem was getting a 981 to use for confirmation of wheel fitment. Dang! I went right by them two days before! I offered to drive back and have them use mine as a prototype. As of this writing they still don't show wheels, but last week I was informed in a phone call they do have a fitment. Why they haven't updated their site is beyond me.
I don't plan on going to Florida any time soon, but if you haven't gotten hold of a 981 by a few months from now that could change.
Minus 40 degrees... Is that Fahrenheit or Celsius?