stevage, have you heard of the 7 Peaks Alpine Ascent Challenge? If not, look it up, and then do it before the Alpine Classic starts. The Alpine Classic qualifies for 1 or 2 of those climbs, so you'll end up doing those ones twice, but that's OK.
Rowan and I did the 7 Peaks Alpine Ascent Challenge last summer and it's good. It's a nice variety of climbs to get you fit for the Alpine Classic, and of course actually doing some of the climbs on the Alpine Classic will help as well. Here's our write-up:
http://www.machka.net/2012/7PeaksChallenge_2012.htm We did them quite slowly, but then we weren't training for the Alpine Classic. You'll want to do them faster.
Then join Audax Australia's Victoria club and start riding some of their 200K and 300K Audax events. Pick the hilly events.