So after doing some research it seems the S5 non-LSD stub shafts
may work. I found a post over on the evil forum (one in hundreds on the subject) that mentioned the S5 shafts working. Also, Mazdatrix has one P/N for the S5 non-LSD, which seems to indicate the sides are interchangeable.
So... what I guess that means is I no longer need this thread