These aren't Australian images, but they are amongst the very best of the Leo Triplet:
(you will have to search within these websites)
http://panther-observatory.com
http://www.sierra-remote.com
(find the image by Greg Morgan)
http://www.karelteuwen.be
Large size versions of the Leo Triplet image by the VLT Survey Telescope can be found at
www.eso.org
The biggest version is 483 MB !!!
Incidentally, this telescope is
not the VLT ......it
is a recently completed 2.6m Survey Telescope that will be used for various specialized sky surveys. Imagine a 2.6m finder telescope!!
[ A similar telescope, VISTA, will be doing a high-resolution survey of the entire southern sky]