Where can I buy fake cigarettes that you actually smoke to help quit smoking?

I’ve been smoking heavily for several years now and I’m looking for various methods to quit smoking. I think my biggest problem isn’t the nic fits, it’s the physical addiction.

I’m looking for some sort of fake cigarette that you light, and smoke, but contains no nicotine. Best thing I’ve come up with so far is to buy the fake marijuana substitutes and roll that as a cigarette.
I guess it doesn’t have to be something you light, but something to drag on and inhale would be so helpful.