We call this 'reciprocal borrowing': CSU offers this service to students at other universities and those universities offer it to us!
Have a look at the lists of participating ULANZ and UNILINC libraries. Are any of these near you? With the ULANZ borrowing scheme, there can be some costs associated, but with UNILINC it's totally free! If there is a university library you have your eye on, contact them to find out how to become a member.