LR have minimal records of that period of time, but i've never directly asked for RAAF and RAN docs, however I believe they have sent me all that they have. I will ask directly however.

I do have the series 3 production data, but I think that excludes station wagons as they were brought in whole, not locally built (only one confirmed RAN S3 station wagon from a photo). However i'll check the colour column more closely tomorrow.