Some ideas here.
vaping my tie would be cool but I do not wear a tie. Lanyard inside my shirt? - not out of the question but the eGo battery with
tank is pretty large for dangling in front of my fat belly. Use my eGo case? - rather large at 6" x 4" x 1.5". The Beefy Pocket Organizer? Yikes. At 6.25"(L) x 8.75"(H) x 2.5"(W) it is even bigger than the eGo case. The sentry gear leather looks like a good idea. They look to be made more for the large battery packs like the provape rather than the eGo type battery.
I'm beginning to think that just carrying my battery and the tank in a separated condition in my pants pocket will have to do. But thanks for all of the thought and ideas. There are many more options than my little mind could think of.