DF,
Grizzly sells a self centering vise for $130.00 that is very similar to the vises used by Italian engravers. It can be bench mounted about chin high for H&C or mounted on a bowling ball as shown by Monk. It will keep your work centered better than a drill press vise.
http://www.grizzly.com/products/Prec...ing-Vise/H7576
If you go to a power driven graver you will eventually end up getting an engraving block.
As to pictures of my set up, I'm not sure that would help as my tools have been assembled over 33 years and are on the high end of cost. When you get to Florence I'll go over everything with you.
CRB