Hi penthrox /ubbthreads/images/graemlins/wink2.gif and welcome to cpf! There's afew of us Aussies around now /ubbthreads/images/graemlins/smile.gif
Firstly I would suggest getting a spare lamp assembly, as well as a reasonable supply of SF123 batteries for it. You can get the Surefire SC1 spares carrier (see web link below) to carry the spare lamp as well as 6 batteries. There are two lamps available for the 6p, the P60 that is installed from the factory (65 lumens), and the P61 that puts out 120 lumens of light. I only ever use the P61 in my G2z, however as you will probably be using your light on a regular basis, the 60 minutes output per battery set might be wise as compared with 20 minutes with the P61...
Another option is to go to Big W (Australia's Walmart equivelent) and buy a 'waterproof match holder' from the camping section, which for $1.94 or so AUD fits two SF123's perfectly /ubbthreads/images/graemlins/smile.gif
There are three Surefire brand holsters you can buy:
The V70 speed holster
The V20 fixed loop
The V21 quick detach
As the 6p is the 'original' and very popular, a plethora of after market holsters are available for it. There is a holster that I have seen in the shops that I think has been made by Accusport on the Gold Coast. You can also get a custom holster made from places such as Platypus Outdoors in Melbourne (also Blackhawk and SOE in the US), as well as Uncle Mikes Brand, GK and others that I don't know of.
See
http://www.surefire.com/maxexp/main/co_disp/displ/prrfnbr/889/sesent/00 for pictures and a full range of Surefire brand accessories for your light.
However before you jump in and buy any 'gucci kit' for your 6p you need to consider your requirements and situation (i.e. in your case for security)
These are things that I can think of from the top of my head:
* Light retention - You want to keep a hold of your light whether it is in your hand or in your holster / pocket. This means choosing an appropriate holster that will retain your light during times of 'aggressive negotiation /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/rant.gif /ubbthreads/images/graemlins/twakfl.gif /ubbthreads/images/graemlins/banghead.gif' or simply when participating in a typical crowd environment.
* How often do you intend to use the light? In Australia, using this light for general use will be an expensive proposition with lithium batteries: will you use it to check id's or 'dark' areas (I'm just using these as examples...)?
* Light Retention (again /ubbthreads/images/graemlins/grin.gif) you don't want to lose that great (not to mention expensive) light /ubbthreads/images/graemlins/smile.gif, not only when holstered, but if you have it in your hand when or if the poop hits the fan /ubbthreads/images/graemlins/wink.gif
* Force options: do you intend to integrate the 6p into your use of force continuum (probably not but still...)? If you do, thoroughly think it out, experiment with reactions (from both intoxicated and sober persons) to the light, and figure out a way to keep a hold of it /ubbthreads/images/graemlins/smile.gif whilst carrying out your other duties /ubbthreads/images/graemlins/naughty.gif (see aggressive negotiations above /ubbthreads/images/graemlins/wink.gif ). A conversation with management etc about this might also be in order /ubbthreads/images/graemlins/thumbsup.gif
These are just afew points that I can think of to consider for your particular situation. Hopefully i've been of help /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/smile.gif, and at the least given you some food for thought about accessories and your new 6p...