in '28 the truck bodies were
from outside suppliers Chip, but that cab and bed are entirely home made and nothing like cabs of the day, all the hardware on it could be found at your local builders supply, including the screen door closer spring and cupboard handles

all I've seen that old have cabs
similar to this, including the split windshield and the feature moldings that carry back from the factory ones on the cowl
if the price is right it could be a fun project, but I'd be wanting to find a more correct cab, probably very scarce .... of course being an old fart you've got lots of time to hand form a better one yourself

Bill