Another Stagea in Canberra, welcome!
I got mine done at Integra Automotive which is on Lanyon Drv just out of Queanbeyan, but my 100,000km service was about 3 years ago.
It depends if you're northside or southside. Check out the SAU-ACT thread for good service locations, most people will tell you Trojan Motorsports in Mitchell.
Autotech know the Stageas well now, an early stagea owner (Jay95R33) got a Unichip installed there.