In any case, there's got to be an Ozzie - a WHOLE lot closer (for lower shipping expense) to you - than literally the other side of the world, up here!
Also, if by now the Airfix Ajax has somehow become scarce (which it never was, before), you might have better luck finding/bashing the Airfix Tiger (scroll down): that was even more ubiquitous - including reboxing with the Airfix Daring - and (if all else fails) I know I've got at least one spare of that kit, in The Pile.
So, Welcome Aboard John - I trust this thread will draw the attention/response(s) you need - and keep us posted, buddy!*
*Translation: In Amerkan, "Buddy" means "Mate", in Ozzie!