Well here is what you want, but it's dubbed in another language and you have to sit through two other Lucy seduction scenes first to get to the "hair job" scene. The quality isn't perfect either, but it's watchable. If I can, I'll try to upload the proper clip for you.
On the plus side, at least with this clip you get to see her lick and suck a guy's finger in the first scene.
You also get to see her beautiful hair up as she kisses a guy in the second scene.
The "hair job" stuff is in the third scene of this clip. 
There's a download button on the page below if you want to download the clip after watching it first.