Nikon SB910 & Better Beamer

I recently purchased a nikon SB910 flash. I do a lot of zoo photography and would like to extend the reach of the flash with my long lenses. I am looking for a Better Beamer for the nikon SB910 but cant seem to find one. I am wondering if the Better Beamer is even made for the Nikon SB910.I see they make one for the nikon SB900 but not the 910. Does anyone have info on this.
As always any help is always appreciated.

I have one that I used infrequently...Shoot in raw and use the lighting features in your raw file processor...