^^^ Not to my knowledge Project M has that. However, there are Stamina Mode-related mods out there for Brawl.
But seriously, all Stamina mode needs is a wider range of Damage Percentage (1-999), a time out option (kinda like stock mode; I think it already has that, actually), and of course the option for additional stocks.Then, that crazy comprehensive fun little side mode is a lot more fun to play, and has a lot more versatility. There's really no reason that these additions shouldn't be added to Stamina Mode. It wouldn't take much more time to make by any means, since all the physics, data, and options are already there.
Side note: then after that all we need is a new mode (King of the Hill?), Bonus Mode to come back and not be random, and Coin Mode to have a stock limit!