Sorry can't help you! We tried to buy detailed maps before we came to Perth and failed miserably! When we got here we went and bought a Garmin Sat Nav with Australia/New Zealand/Tasmania on it, it's been brilliant, so useful :smile:
Not what you're asking for but if you're after a good book to peruse over and plan some Aussie camping trips, we've just bought a fab camping book of Australia, called 'Camping Around Australia' Published by 'Explore Australia Publishing Pty Ltd' by http://www.exploreaustralia.net.au (Actually the website is very interesting for info and maps too)
It has good maps, camp site details, interesting features, etc of the whole of Australia & Tasmania. It cost us $39.99 from a book shop, which was a bargain because it's basically a map book for the whole of Oz. There are lots of maps and books available to buy on their website - you might be able to get them ordered in the UK?
Hope you find a decent map, I was always on Google Maps and street-view pre-move.
Good Luck
Liz