Outer Limits 4x4 Board

Does anyone know where to buy 6AWG power cable at a reasonable price in Sydney?

I'm adding some Aux power in the rear of my GV and need 6AWG/BS/Gauge cable to go into my 50A Anderson plug.

I already have 8AWG and can buy 4AWG easy enough (Jaycar/Electus, Altronics, WES etc) but would prefer 6AWG as the Anderson plug suits 6AWG and I won't have to trim 4AWG cable to fit.

I intend on putting a second, removable battery (in a battery box) in the rear and want to charge it from the alt.

BOC Gases in Melb and Geelong have good prices on 70mm2 and below cable - see if you can find a local branch near you. I think this is 00 gauge.