The only way to make a good feinting build is to use the Invisible Blade from Complete Warrior and the Surprising Riposte feat from Drows of the Underdark.
However, if you succeed with this, consider working in Ijautsu Master, since Surprising Riposte causes them to go flat-footed.
A 170:
Are you thinking of Champions of Ruin?
I know they had Arrow Split.
...preview-ninja'ed