Hi Mike, I see you're from this side of the pond.

For availability of obtaining parts etc,most of the vendors/dealer here tend to lean towards the smaller trucks. i.e. 1/2 ton.
There are quite a few AD and TF trucks over here now both in stock and custom form,so obtaining one should be relatively easy.
Good luck with your search.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.