pop up set by country

Hi guys,

Does anyone know off a free plug in that generates pop ups but lets you set who sees them according to what country they are in or not in?

I have 2 very similar websites but one is aimed at visitors from Australia and one is aimed at visitors from the rest of the world. What I want to do is for Australian visitors to the global site to get a message giving them the option to be redirected to the Australian site once and the start of their visit and the same in revers for non Australians visiting the Australian site

I can’t find one through search and I am not tech enough to do it myself.

Cheers