Doesn't get a lot of love on the boards, but there is the Kamry K1000 if you don't mind the short battery life with the smaller 18350
batteries and are prepared to replace the plastic
tank it comes with, with say a
nautilus Mini when the plastic threads go.
I don't use epipes now much, but still have a soft spot for this one as when my daughter gave me one 7 months ago it made giving up tobacco after more than 50 years dead easy.
There are specialist groups which'll show you some fancy custom jobs with of course prices to match.