First of all, the only way a meeting gets organised is if someone organises it.

Second of all, you may have to leave your Metro area, especially considering how few Jazz players there are. I think there are maybe one or two Melbourne players who are still active, and a good number who have since stopped playing. I doubt all of them will be willing to do a meeting, but you could make a small one.

The first thing is finding interest. You will have to travel, probably, to wherever is overall the most convenient location. I doubt you will be able to find enough people for more than a get-together in Melbourne (but you might want to try that first). The Australian JJ2 community just isn't as strong as the American or European ones.