Action Movie (Fluff) rules question

[Dlatrex]

Hey gang. I have seen several Tyranid armies that use the 'Aliens' Xenomorph aesthetic, and I understand you could easily have genestealers represent how a xenomorph might fare on the battle field. Short of coming up with something by homebrew, has anyone seen/used an existing unit's stats if you wanted to model a [URL="http://good-wallpapers.com/pictures/5488/Aliens%20vs.%20Predator%20-%20Predator%20Imba.jpg"]Predator[/URL] in game? I was thinking that maybe the lightly armored Lictor would serve, although that might be a little strong for his physical prowess.

Edit: Oops! posted in the wrong forum. Mod please delete.