Hi Jock, There are plenty of AD series trucks here in NZ both full size and pickups. I have got onto someone with a spare pickup cab that is parting it out but if that doesn't work out I will have to call on all my sheetmetal skills and convert it myself.
I want to keep the dash layout as close to original as possable as opposed to customising it I love those art deco dashes.
Just need to find some suburban rear fenders for the rear and that will be a LOT harder. At least I think they are suburban or panel fenders. Check out the pic below
http://rides.webshots.com/photo/2885465480101009564hshAvYWilly