If you're adamant at staying on Tonberry, just create your character on another realm and pay for a realm transfer.

Although if you don't want to go down that route it's understandable.

In terms of unofficial Aussie Servers, you have two options for the most part, Tonberry on the JP Servers and Behemoth on the NA servers, ping difference since the relocation is now ~20ms from Melbourne so it's not as hindering as it was previously.