$104.00 Wouxen UVD1-P (4w, handheld), if you buy 3;
$132.50 Yaesu FT-277R (5w, handheld radio), 1-off;
$266.50 Vertex-Standard VX-2200 (for the car), 1-off.
(Older UHF CB gear - eg, ICOM's IC-41 (handheld) and IC-400 Pro (mobile) - cost over $400, and they'd need programs & cables to add the 40 new UHF CB channels.
Also, VX-2200 haS been supplied, in AU, for years for use on AU's (pre-2011) 40-ch UHF CB Radio Service.)
This vendor supplies high-quality, Japanese-designed alternatives from Yaesu & Vertex-Standard, as well as reasonably good gear from the Chinese maker Wouxun.
All of this bargain's radios cover AU's UHF CB frequencies, including the 40 NEW channels (total: 80 in all, of which 77 are now authorised for use in AU), which were added to AU's existing 40-channel UHF CB Radio Service (CBRS) & authorised, by ACMA, for use from 1 Jan 2011.
The nice thing about the newly authorised 40 UHF CB channels is that they'll be relatively -quiet- for a while, because only one (very recently released) radio covers them "out of the box."
(In the case of this bargain's handheld radios, you'll have to setup the 40 new channels, yourself - ie, just like you'd have to do with the older & costlier ICOM IC-40S, EXCEPT the IC-40S setup requires costly software + an optional cable to do the job, while this bargain's handhelds do not; just keying channel frequencies - from ACMA's web site & Bob's your uncle!).
AFAIK, the only UHF CB radio that comes "out of the box" setup with all 80 channels, is from Uniden (price yet to be seen by me, but I bet it's high…?).
(TIP: To get on-air quickly with those handheld radios, just set up a few of the 80 UHF CB channels now, & add the rest later; you might want the emergency channel to one of them, but be sure NOT to use it for NON-emergency calls.)
Strictly speaking, use of some of these radio may not be "strictly Kosher" (largely because user programming of frequencies is required, as it would be with the ICOM IC-41 and IC-400 Pro, mentioned above); however, if one is in an emergency situation, one may do what is necessary to save one's Life,
Moreover, I'd suggest that ACMA would feel much "heat" if it were to bother any flood-affected farmer or other flood-victim, who chose to DIY, in order to save $$, providing for their own communications, especially while the mobile network is off-the-are.
YMMV. (FYI, I own & "love" each of bargain handheld & have researched the VX-2200 pretty well.)
Finally, the nature of the vendor's web site doesn't allow convenient listing of URL links to particular pages.
Just select each radio manufacturer (from a drop-down menu, on the left side of the front page) and scan the pages that result.
(In the case of Wouxun, you'll want the UVD1-P that covers 420-520 MHz, since our Aussie UHF CB frequencies are around 477 MHz. Note: If you're in a bush-fire area, you may be able to program-in (for Receive-Only) some fireground frequencies, since this radio also covers VHF - unlike the other 2 models listed.)