Thunder down under
Australia has special-forces units attached to police and paramilitary divisions, including the SAS, but the names of these vary from state to state and aren't common knowledge. Discovery of the missing rocket launchers would certainly prompt responses from these units and probably from the mainstream military as well.
Nobody here doubts that those rocket launchers are in the hands of bike gangs rather than jihadists, since that's where most illegal ordnance in this country ends up. What's more concerning for the powers that be is the relative lack of conflict between the various gangs here (mainly the Hell's Angels, Gypsy Jokers, Warlords and Finks don't cross each others' paths here much, but the Rebels are another matter entirely). Our Prime Minister, John Howard, seems intent on turning Australia into the 51st state of America, a policy that does NOT sit well with the general public. America is not popular here in Australia, and there are many who speculate that should Howard attempt the final sell-out, Australia could well see its own version of Bastille Day - led by the bike gangs. Our government is not blind to this potential, and has been putting laws into place to try to combat this menace without openly stating that preventing an armed insurrection is what this is really about. The "terrorism" excuse is wearing very thin, however, and politics in Australia could get very interesting over the next few years...