Kinda yes. There are a number of SA models available now on jk3files.com. There are also backhand sabers available that use the staff animations for fighting.
There are mods in the works that change the swings of the staff style into new backhand animations. Noteably the ones I've done.
Check it out in the showcase forum.
So far none of the new attacks have been released to the public. I'm still tweaking mine to make them better and other people are releasing their's with other mods. So for now you can have a SA model, but have to wait for the backhand style.