Here is an interesting company, I have nothing to do with this company in any shape or form, but by the looks of them they have everything in raw metal stock and more.

http://www.metalcorpsteel.com.au/

This link will take you to the home page and you will see a menu of sorts, go to the one titled (Resources), and you will find another menu. At the bottom look for (Metalcorp Steel Guide), this will take you to a down loadable PDF file titled (Metalcorp Steel Guide 2006).

Here you will find all sorts of goodies they carry in stock, at the bottom of this document there are conversion tables and all other sorts of goodies, have fun!....