Well, the 808 is the same thread as 901 but I'm not sure how the airflow is with a standard 901 connector. I generally use DC sockets for my 901s and they work fine with carto's... Although, I only get vaper from carto's I've filled myself.
I also find carto's are better at ~5V.
You may be able to get yourself a 901 tube/torch style mode that'll take 2xCR2 for 6V or 1 14500 for 3.7V. I don't realy follow commercial mod's so I can't point you to one but you could always make one yourself. There're plenty of torch mod tutorials around.