Just google 'Night vision goggles' select Australia.
It seems the goggles may be legal.
On a side note I found these 2 items on an Australian supplier of body armour (Tote Systems) website:
Q. Can any Australian citizen purchase body armour?
A. No, ballistic body armour is classed as a category E firearm under the Australian Firearms Act. Anyone can apply for a permit however generally only applicants who are members of a police service or the security industry are accepted. Australians wishing to use body armour domestically (within Australia) will need to apply through the appropriate department.
See the 'client' at the bottom of the list - what a give-away
