Given that they are agi's I reckon Werk is probobly on the money with Rex, that and it wouldn't be too obvious otherwise it wouldn't be a quiz. LOL.
Just out of interest, the chequers on the foot plates behind the front bumpers run the same way as the Diamond Reo ones, from memory, the White ones ran 45 degrees opposite. The red one has a fibreglass bonnet as well. Wish I could have found one of them when I was doing mine.
Ute, the cab was mounted at different hieghts for the Diamonds and the White as well, so the radiator and grill was shorter on the White 2000's. They are all similar but a few little differences.