Aw, that would be such a shame, Jim. Don't lose faith, though. It may yet put out some new growth. It takes a lot to kill a tree that big.
Patty's been helping me get the garden presentable this week, and we found a young one under my mango tree that is almost 4ft. tall (which tells you how much weeding we did
) It's a baby 'Carrie' same as yours, so if you want to try again for free, I'll save it for you. I know you've had tons of wonderful fruit from that tree, and we may not have another cold winter for years.