Blocking access to the site from Australia probably won't make a whole lot of difference, because the real reputational damage might arise elsewhere. Simonds need to get the site shut down or amended.
The most obvious way to do this would be to file a DMCA complaint. "But wait," you say
The other way to do it is to hire a law firm in INDIA and threaten legal action over there. Indian lawyers are not expensive, but in my personal experience in a similar case.. they are of highly variable quality. Probably better than the Ozzie lawyers Simonds hired though. But if you actually want to *do* something about the problem, then India is the place to go.