It might be a good idea to use music by Australian composers. The feast of Mary Help of Christians in the centenary year of Federation would be a good occasion to re-examine the parish hymn repertoire to the Virgin Mary. There is little to choose from when it comes to specific hymns for Mary Help of Christians. The most obvious example is Help of Christians, Guard This Land by Richard Connolly. The Sunday liturgy and the liturgy of the feastday can include petitions in the General Intercessions relating to the celebration of Mary Help of Christians.
Some examples follow.
Let us pray, with the help of the Virgin Mary, for Australia that our nation contribute to world peace, human rights, and justice for all. Lord, hear us. Let us pray, with the help of the Virgin Mary, for the people of Australia that they be selflessly united in working for the common good. Lord, hear us. Let us pray, with the help of the Virgin Mary, for Christian leaders in Australia that they be beacons of the light of Christ on our shores.