This one would theoretically work:
$2.13 X-Power Nylon Flashlight Holster (Black) at FastTech - Worldwide Free Shipping
The main issue you have is the overall length of the vamo and tank combined (still dont know what tank you use).
This unit has a main pouch and a side holder, its a bit too short to accomodate a whole assembled vamo/tank, but the 18350 Vamo will fit in the main holster with the tank stored in the side pocket (originally for extra battery). Not ideal but would allow you to carry it easily, just have to slap the tank on to vape. Other issue may be getting crud in the tank, but a condom (e-cig kind, lol) over the mouthpiece of the tank will solve that.
depends on the juice, sometimes i'll have a dct or an iclear30. i'd really like to find a way to have it assembled as most times i get a few moments when my hands are free and would like to just take a couple drags and be on my way. right now, i try to put it somewhere out of harms way, but then i wind up either a floor or 100's of feet away and it's not practical to leave what i'm doing to get to my pv.
when i smoked, i always had a pack in my pocket and 2 packs on the dash in my truck. free moment, light up and continue working with my cig in my mouth. if i crushed the pack in my pocket, i could go to the truck and get another.
as far as the work i do, it envolves everything from footing to the roof. when i'm doing finish carpentry, it's easy to place my pv somewhere, as i'm always back and forth from my miter box. if i'm running the back hoe to dig a footing, i can pop it in the cup holder. but times when i'm framing or up on pump jacks, i need a convenient, safe place for my pv.