You realize it is ridiculously unlikely that anybody on this forum has ever had that pack, right? The Gamecube already sold pretty poorly, only selling about 22m systems total during its lifespan. The vast majority of these sales occurred in NA, Japan, and Europe. Maybe a few hundred thousand Gamecubes were ever sold in Australia, and that may be pushing it. I'd guess as low as 100k Gamecubes were ever sold in Australia. You then have to consider that this pack came out in spring 2003 as a promotional pack and was probably gone by mid-summer. With that in mind, I'd guess maybe 5k - 10k of these packs, maximum, were ever sold. Even then, most people probably tore open the pack because they bought it with their new Gamecube and wanted to use their controller and play their game. The majority of people discard packaging from stuff like that without a second thought.
With that in mind, you will, in all likelihood, never find this pack complete in box. I hate to dash your dreams like that, but this was uncommon and probably not incredibly popular except for the fact that it gave another controller for cheap. If you get really, really lucky and some video game collector who got their hands on the pack and preserved it decides to sell of their collection someday, maybe, just maybe you'll be able to get the pack at probably three times the retail price minimum.
If you just want the controller, that's easier to find. A quick search on ebay yielded quite a few indigo/clear controllers. They're a little more uncommon, but they weren't sold exclusively in that pack or anything like that.