Yes, I've found that they almost certainly were not the M579 of the US Army but what appears to be a home grown unit. Looks like two variante too, one with a relatively light crane of about 2.5 tonne capacity and a much heavier one (can't remember cap).
The best info I've found so far on organisation comes from the AWM of all places...
http://www.awm.gov.au/atwar/structur..._structure.asp
Unfortunately it's the Squadron Headquarters with it's masses of vehicles that's making life difficult:
Support Troop (17 armoured personnel carriers, 3 tracked load carriers)
Administration Troop (4 armoured personnel carriers, 12 tracked load carriers)
Tech Support Troop (6 armoured personnel carriers, 1 cargo carrier, 1 armoured recovery vehicle)
4 x Armoured Personnel Carrier Troop
Doesn't help when I know from experience that the APC units I've worked with had Troops of four vehicles rather than three.
My assumption is that all the MRVs were given to 3/9th during the pre deployment buildup. 48 turrets were purchased by the Army so there's plenty to play with plus a few spares. Currently I'm toying with using about 12 of the 17 Support Troop APCs to create a recce/FSV troop mainly armed with the MRVs (3 troops of 3 MRVs plus a command group of 3 M113AS4s). With their 76mm guns there's little need for Leopards to go to Korea, at least not in the fire support role.
Note also that there's 2 Sabre Squadrons, plus Combat Support Squadron in the 3/9th so that's a LOT of vehicles to play with. My guess was the CSS contained the engineering troops and vehicles, but then what to do with everyone in Squadron HQ troops above? Basically it seems like an embarassment of riches.
AT capability would have to come from the 84mm Carl Gustavs and M72s, although I'm tempted to attach a couple of milan teams to Brigade HQ.
Artillery is decent with 12 105mm M2A2 towed guns plus numerous 81mm mortars in the two infantry battalions. Air assets would be limited to a couple of C-130s at best - nothing rotary. Anything additional would be sourced from the Americans or Koreans.
Once I've sorted out the deployed force, I'll then whittle it down to 2000 levels using Vietnam casualty ratios as a guide - in other words, the Australians suffered only half the casualty rate of the American units and are therefore effectively still relatively strong (approximately 1200-1500 troops and about 60% of vehicles in one peice, less a few stripped for parts).