There are some companies out there that make e-hookah juice. When I first started out vaping (not too long ago), I was on a search for e-juice that I could buy locally, so I would stop by local smoke shops. One that I found was a hookah shop, I went in and they had some electronic hookah's and e-hookah juice along with some stick batteries (like the ego-C you tried). I bought a couple small bottles to try. The flavor was very bold and rich, and pretty darn smooth if you ask me. To be honest it was a bit too much for me, so I would mix that juice with some tobacco flavors to cut it a bit. The name on the bottle was Blak e-hookah juice. But I tried to google them and did not find a match. I think it is a small company just getting started.
So yes, they do make some out there, but it may be hard to find. As a side note, I went back and tried the flavor again after about a month of not vaping it at all, way too flowery tasting for me.