http://ajh-knives.com/supplier-2.html

These are sharp, properly spaced, and durable (and expensive, though good value). Many of the "sets" have rounded letters, and numbers that do not make a crisp mark, and they space rather far apart, and getting them perfectly in line can be trying.

Or maybe this:

http://www.britishblades.com/forums/...-blade-etching

Lots of youtube also.