I do see that there are some commercially produced ones out there, however they either don't ship to Canada, or are more expensive than a pack of regular cigarettes here even with the 70% excise tax on tobacco cigarettes.
The last pack of regular tobacco cigarettes I bought (Pal Mall Full, King Size, 25 pack) was $15.98. With the shipping even off amazon a pack of herbal would be at minimum $30.
So for this reason, I bought a 25g tin of a herbal smoke blend, and packed it into cigarette tubes, smokes just like a cigarette. Yes, they don't taste like tobacco, but they are smokables and enjoyable, at least with the blend I got. I guess it all depends on the specific blend. I hear Mullen specifically is often used as a tobacco alternative.
I was told by others after smoking them, that I smelt almost like I just smoked a regular cigarette, my fingers did certainly smell that way. I also did seemingly get a slight buzz from smoking the first one, just as if I smoked tobacco, though I didn't get a buzz with any I smoked after that.