BTW, all replacement Army vehicles entered SVN via 2AOD (or its predecessors), before being released to a unit on a 'one for one' basis as required, or as authorized increases in Unit holdings of a particular type. The exception was some engineer plant, which went direct to the engineer vehicle park.
Army Vehicles taken on charge by a unit in Australia as unit equipment prior to deployment to SVN were not processed through 2AOD, but were the responsibility of the holding unit, who took charge of them upon arrival.
All Army vehicles being RTA-ed were processed through 2AOD (except some engineer plant). The possible exception was the withdrawal phase, when vehicles were returned to Australia direct to units that had them on charge in SVN, but even then, their 'out-processing' appears to have been handled by 2AOD staff.
D: Haflingers in SVN? Never seen evidence for that, and don't know where it may have originated from. It probably came from the same source that started the rumour that Australian Ferrets and Saladin A/C's were used in SVN as well!!
Air transport was a 'high priority cargo' method. Urgent needs of the Task Force, including vehicle parts, were dispatched via C130 from Australia, or even commercial air (QANTAS 707) as needs be. Turret kits for M113A1 APC, artillery spares (M101A1, ie M2A2 gun buffers), Centurion spares, and such like, where the efficiency/operability of the Task Force was at stake, were sent in small quantities by air to tide them over, with the bulk then assigned to sea transport. The C130s were also used in-country to ferry some Army vehicles about in 1965-66, but I have not come across any such use later in the deployment. The RAAF may have transported their own vehicles into SVN - 'Ronnie Raaf' was/is a law unto himself, so anything was/is possible, as 'expense' doesn't seem to vector into their thinking - but with the strain on that particular resource, I somehow doubt it was a common practice, if at all.
Mike C