I've found the trailer:
Jeff Richards stars in "Sheep Man" - a film about a man who loves sheep too much. Also features: Morgan Murphy, Rick Shapiro, Brian Holtzman, and Jordy Fox. With Music by Rob Bennet and Bret of the Flight of The Conchords. Directed by: Ron Eigen
Here's some more info about the short film by the LA Times since it screened at the Hollywood Film Festival back in 2006. The film also screened at the NZ Film Festival with Jemaine and Taika's short film "What We Do In the Shadows. More info here.
The official website for the film doesn't seem to be working for me atm.
Has anyone seen it or have any more info about it?