I don't belive the Dixon tools are made any more. The tool on the
left marked with a fish is probably French or Swiss.. The shapes
shown are more or less the shape of engraving gravers but probably
are larger versions. You can find standard engraving cutters
with a Google search. If the standard gravers are too small, you
can forge and shape larger versions per your requirements from
tool steel stock. A simpler way probably is to buy some standard
chisel designs and modify them. A good place for these place like
McMaster Carr: http://www.mcmaster.com
see page 2178 to start for cape and diamond shaped chisels there
are other forms of chisels and punches that can make a simple
starting place ( page 2130 to start).
Another place is MSC: http://www.mscdirect.com see page 2280 .
Look at books on chasing and repousse.
I have seen the ubiquitous serving trays being made in the middle
east in a more peaceful interval about 40 years ago. These involve
some basic hand punch raising of the edges followed by carving and
stamping a design which is often inlaid with silver. The carving
was done with chisels a bit larger than standard gravers but the
process was engraving. I believe all the tooling was locally made.
I think the same type work is done in India and Pakistan and their
might be some factory tools made there.