Magic, as-is, is a feature of
KoW. It's part of what differentiates the game from
WHFB's style.
There are some fan-made things but I think most are on Mantic forums or via internet searches.
Orcs list will be pretty easy to use as its written.
The Chaos has no direct counterpart. Evil humans would probably be close esp. if he goes Knight heavy. The cool thing is you can mix and match units from different 'armies'.
EDIT: Checked the Abyssal Dwarves list and the Humans. You may want to try some of the Abyssal Dwarf cavalry and possibly use the Ogres (they're part of Human armies) rules for 40mm bases Chaos troops.
For each warmachine and a hero/monster from Army X you must have a minimum sized infantry (20), large infantry, cavalry (10) or large cavalry included.
For example, if I wanted to have dwarf cannons in my mostly elf army, I would have to field at least one dwarf unit of appropriate size (e.g., a 20 man shieldbreaker unit). That 20 man unit would unlock a dwarf warmachine AND a hero (or monster). If I wanted a second cannon, I'd have to include another minimum sized dwarf unit.
Here's also a fan list for
WOC:
http://www.warseer.com/forums/showthread.php?308358-Warriors-of-Chaos-list