Finding Reports of Royal Commissions and Commissions of Enquiry
The Commonwealth Parliamentary Library has a chronological list of all Commonwealth Royal Commission and Commission of Enquiry reports from 1902 to present. This list includes all Royal Commissions and Commissions of Inquiry (the nomenclature varies) appointed by the Australian Government from 1902, under the provisions of the Royal Commissions Act 1902. It does not include Royal Commissions appointed by Australian state or territory governments, unless the Australian Government was also involved.
The full text of all of these is available on the Senate Tabled Papers Database. Select 'Royal or other commission reports' in the Description field. The reports are only listed alphabetically on this site.
The University of Melbourne also holds some Reports of Commonwealth Royal Commissions in hardcopy. Use the catalogue and search for the keywords 'royal commission'.
Enabling Act: Royal Commissions Act 1902 (Cth)