AIF and AMF Mid-East vehicle supplies

[David_Hayward (RIP)]

In order to make sense of 1942 papers, can anyone tell me what

6 AOD
4 BOD
9 VRD
MEX .Carriers were sent by rail to MEX..so Middle East eXchange?
W.E. in relation to stocks of vehicles.

mean in relation to vehicles for the 9th Australian Division?
The "8 Armd Bde" is obvious, and mentioned.

I should mention that it appears as though the "11T" Fords may have been delivered as 6-cylinder versions, but 1942 Models. They may have actually ordered 6-cylinder 1GT 1941 Models and received 2GT Jailbars. Anyone got any photo evidence please from North Africa, around El Alamein say? Note that there is no evidence that Ford of Canada produced any 4- or 6-cylinder 1941-2 Trucks so these must have been US-sourced.