I dont get it? why you need this? you can make your own setting to change your style.
Settings:
Injuries : put it on never you will not bleed
Health regeneration: put Maximal its hard to kill you
use Perks, like the "Feel No Pain".Perk and this also boost your health,
at least you can use preparations to boost your health even more
With all that enabled, your are like cheating, if you die in this settings, you proberly have to re-think your tactics.
So why you need more Health Bars when you can change the behavior by settings?
For me and my Gamestyle at the hardest settings, i love the fact that i am death after 3 hits, or one shots by sniper.