Outer Limits 4x4 Board

I am trying to source silo section (or silo tube) in Melbourne to make rocksliders for my Disco - same as Glenn Wright did on his Rangie in 4wd Monthly. He sourced his from Dubbo. Can anyone help me with this? I do not want to use just plain RHS. I have called many places and can only get 40t or 20 lengths - but that is a bit more than i need.
Thanks

unless you few ppl to chuck in for steel and a bit more for making them up, that could work

Give Dandy Steel supplies a call to see if they have any tube available. They also cut to length for you.