How do i use HL2 animations for a ep2 sp-mod? Thread

I am working on a HL2 ep2 SP-mod called Episode 3; The Closure, (see bottum for link)
and i need a animation for Alyx. She did use this animation in HL2, (or maybe it was ep1 but
i believe it was HL2 itself). When i try to give her this animation in ep2 it doesn't work.
So i probebly need to extract it from HL2 or ep1 and add it to my mod.

But i don't know which file(s) i need for this. To be more precise, i need the animation
called FlipLeft, or another one called FlipRight. There are both quit simular, they just point
the other way around.

Could someone please help me with this because it is quit important to my mod, it has a big impact
on the final scene of the mod and without it i need to rewrite the whole end scene what would
make that the mod can't be released soon.

Please help me with this, it would mean a lot to me and ofcourse will you be credited for it in the
mods credit list and in the readme.txt.

thanks,
Leon

LINK MOD INFO, SCREENS AND MOVIES:
Moddb.com