To source images yourself you might like to try the ANU Image library, a stock photography site such as Getty Images or hiring a photographer of your choice. Please be aware that you need consent from people captured in photos before you can publish the images.
ANU Image Library
You can find vibrant, engaging images which complement your print or web marketing projects in the ANU Image Library on Flickr. You can download them at low resolution for web or high resolution for print. Please get in contact if you have suggestions for images to include.