That lead locomotive almost looks like a SD40, but as far as I know it was only BHP that brought some to Australia to work on their Pilbara operations. They scrapped the SD40s and they are all SD70ACe now.
It's a localised SD40 from a batch of 23 built in the late 60s in Australia for the Western Australia Government Railways. The Pilbara examples were SD40-2 imported from the US.