On board air tank... Where to mount underneath?

[CRUSHU]

I want to run on board air on my tj, and want to fit as big an airtank as possible. It needs to be outside, as I need all the seats for people.
I have heard you can get an auxiliary fuel tank for them, so there must be a little space under there somewhere!
I have just ordered all new bars and sliders, so won't be getting any made as air tanks.
Anyone know what tank fits best?
Thanks

[MR EXTREME JEEP]

Under the pass side. Plenty of room. Remember seeing a pic of a set up where he converted two fire extinguishers and mounted them side by side under there and put a hinged bash plate under them to protect them. Looked real trick.

[Cambo]

I've seen one under the drivers side rear guard positioned verticle... protected and out of the way

[itchy]

Apparently Crush there is a place in Braeside that sells s/hand air tanks ???

[CRUSHU]

Is it a truck wrecker? I bought my last air tank for my F150 from a truck wrecker in Dandenong, but they're gone now.

any ideas on where or who they are?

[itchy]

Find out for ya tomorrow, somewhere around Crawford st?

[Nudge]

Because I have a body lift my 12 gallon tank is suspended across the top of the engine, between the two grill supports.

[CRUSHU]

Hrmm, thats cool.

I looked underneath, there is about 220mm down, about the same wide, and 700mm long, space to fit a tank.
Bummer, theres a used tank for $30 buy now, but it's 850 long.