Goto BAyonet Collection Presentation and you will find examples of both bayonets. There are a lot of Aussie 1920's made 1907's that woudl go with your rifle, although any could have been issued during its life, there is only one amker of Aussie blades although the markigns changed from Lithgowto Orange, it is the same place. As for the No5 the Aussies made trial weapons based ont he 07 for it with variaous lenght blades and a large muzzle ring, but these woudl be mega expensive if you could ever find one - I am sure mine are all fakes -- so you woudl mneed a UK
made one anyway