You could get close but not quite because:
a) Zaon is long out of business.
b) The Zaon system only worked by listening in on the mode C responses triggered by a ground based radar. This means that it really would be useless outside of the radar coverage areas of Australia.
c) The Zaon worked by detecting the direction that the Mode C response came from. This is always going to be less accurate and prone to more spurious signals that recieving an encoded broadcast. I haven't flown with one but when I was in the USA knew people who had them who were less than impressed with the accuracy.