For Paul Mason’s masses you should go to his wonderful website http://www.liturgicalsong.com/Welcome.html where you can order the masses, download free assembly versions and sort out the copyright requirements for your church. You can also get his mass at the new As One Voice site, http://www.asonevoice.com.au/, where you can also buy the As One Voice: The Next Generation book. Better still. tell your church they need these books. For songs that AOV NG sourced from the US and England you may be better to chase up local publishers, but for Australian composers of Catholic liturgical music, Willow, who publish AOV, are the place to go. Let me know how you go.