After doing some searching I found a nice template for the keys here.

http://www.piengineering.com/resources/legends.php

A few death knight icons here.

http://wotlkwiki.info/index.php/8820_Icons#Death_Knight

Other wow icons here.

http://www.wowwiki.com/WoWWiki:WoW_Icons

I am wondering if someone has a link to a complete list of DK Icons?