Hi Scott.
I think some people get it from offcuts from kitchen manufacturers, but I believe you can also get it from hardware stores like Bunnings - the problem is, they may not stock it and it may need to be ordered in.
The ebony star upgrade is definitely worthwhile though - i've a friend who did his (with the help of Orion/Ed) and it's much better. Before that it was very stiff. The GSO design of the 12" base is a bit ordinary.
to IIS! Hope you enjoy your time here and in Australia!