Eli model based on old pre-release HL2 screenshots.
You may do whatever you like with this model.  The face flexes aren't the best and could use a little work.

Installation:
Put the 'custom' folder from this archive into your Steam/SteamApps/common/half-life 2/hl2/ folder

Credits:
Red Katana - model and texture work
MilkywayM16 - upload