Maybe they dont list the XXX-CR because everyone is getting them from OS.............Fair Enough.
$400.00 Australian??? I'd pay that. In fact I paid $500.00 for a XX4 WE from MF two months ago.
Is that listed on the website? Are Losi tires listed? Is the XXX4 G+ Listed?
As Glenn suggested, drop them a line.

Try and get sponsorship to get a major race meeting off the ground.
It's not easy.
I know Tower won't sponsor the Vic's........