Sydney Agents

I promise this won't be another space-wasting post about how I'm a brilliantly talented 14-yr-old who wants a part in a movie. I am 14, though, and am looking to get an agent, for musical theatre in particular. I wanted to know whether the regular agents, who represent adults, would sign a teenager. I look older than I am and probably could not play a 14-yr-old if I tried, and if possible, would rather be represented by an agent that could get me work in the late teen age-bracket. I've researched the children's agents and they mainly seem to have the motto "we'll take all your money and put your kid in a commercial, but only if they're 10 and cute," of which I am neither. Any help with this would be much appreciated.

Jess