Duh, back at you. It was a stupid question. I'd do what I'd do if any part on a bike broke. I'd replace it. I don't know what I'd replace it with. It might be a carbon crank, I don't know. I don't have a particularly strong opinion on that one way or the other. The one I had worked fine for two years, then it broke. So I wouldn't buy another one (of that particular model) because I had a bad experience with it.

Happy to take this opportunity to spell it out for you, though.