The $70 Small Bundle - http://tel.st/bundles/ is the smallest bundle that Telstra have. They might have other options that they can have offer you but that is something you might find easier to discuss with the sales team directly.
They are available by phone and by chat. http://livechat.telstra.com or 1800 709 957
They are available by phone and by chat. http://livechat.telstra.com or 1800 709 957