Hi CC,
you haven't mentioned in your posts which Elzetta model you are wanting the holster for, depending on which model will determine the head size and body length so folk may have better suggestions for you.
I don't have any Elzetta products so I'm not sure of any of the sizes including the main body (battery compartment) diameter.
The main options are bezel up or bezel down, for tactical use bezel down allow the quickest deployment method as you don't have to turn it around to use it.
For bezel down if the body is 1" in diameter, like Surefire, Malkoff and most other manufacturers then once you know the head size you may be able to find something in the ESP Security range. (google euro-security holsters).
The below photo shows my Surefire Fury P2X in an ESP holster.
Shown with overt tactical body armour.
Shown with covert body armour.
If the Elzetta body is 1" then for bezel up carry a simple holster will suffice, (google 'Surefire 6P Holster' for ideas) as long as the head of the flashlight is wider than the body then the flashlight won't fall through. If the holster is bottomless then it doesn't matter what length the flashlight is.
The below photo shows a Kydex holster made by KyTex Shooting Gear, the below photo shows a Malkoff MD3 on a normal sized belt, Kytex also make them for Duty Belts, in vertical and horizontal versions.
A similar thread below may be of interest to you.
http://www.candlepowerforums.com/vb/showthread.php?421342-Good-LEO-light-with-tactical-holster