OH MY GOD YOU GUYS Thomas Fetterman, Inc. has tornado tips for canes now I AM GEEKING OUT SO MUCH
They also have the best ice/snow tips I have ever seen. Even if you only use a cane sometimes for stability on the ice or something I cannot recommend these enough. They look expensive but they last so long that you wind up saving money, and my tornado tips don't even slip on wet marble. Also they absorb impact so well your wrists will thank you.
I rarely use canes anymore at all but I'm considering getting a tip anyway.