Help needed with Cab 43 6 pdr Gun Portee

[chippyrail]

Hi fellas,
Can anyone help with photos or drawings of the Cab, I have a couple of pictures showing the vehicle in a parade with other CMPs' & one from the rear 3/4 view with the cab sheets on. The one from the front shows what I think is a modification to the bonnet, 'hood', it shows a level base to the windscreen which itself is not standard as it has rounded corners like the Bedford & Austin Portees.
These vehicles are not the ones shown on the Australian sites as they have the standard British Lorry bed as fitted to the Bedfords & Austins.
I hope someone can help,
Howard