Durex (Aus) = Sellotape (UK) = Scotch Tape (US)
While I don't have any Australians easily to hand, I will ask my son who is due back from a contract (not that kind) in Melbourne this weekend. Googling seems to perpetuate the myth if it is one, and you may be amused by http://www.toxiccustard.com/australia/other.html which also mentions 4X (Aus) = beer (and in UK now) = condom in US. True? If so does the name refer to the magnification factor as in binoculars, Surely not the number of times.. no I won't ask.
Rod