Where do Canberra-based machinists get big chunks of FCMS from?

Where do Canberra-based machinists get their steel supplies from?



I mean short lengths of big chunky square stuff, that machines well.



I want to get onto making some of the things in Harold Hall's books.



Looks like I'll need 75 x 50mm, 50 x 20 mm etc etc



Ta, Ian.