Scaling by Level for Psychic Daggers for the Soul Knife Rogue

Before I go and try to re-invent the wheel - has anyone published a Homebrew similar to this?

The Psychic Daggers for the Soul Knife Rogue will scale with Rogue Levels - at each increase in Psychic Energy Die they will get a bump in die, and a +1 to hit and damage.  The offhand attack will still only be D4 but will benefit from the bonus to Hit/Damage.

I'm not sure what's been published and what hasn't, but this issue has come up on these forums several times before. I think a lot of people feel that this sort of thing is a solution looking for a problem, since a) Soulknife isn't really intended to be a super damage-focused subclass, and b) Rogues in general are intended to get most of their damage output from Sneak Attack rather than from the actual weapon. 

I am just trying to keep the blades relevant really.  By 5th level most campaigns you would never use the blades again since magic weapons start outpacing them.  This is like 5.5 points of damage difference between level 3 and 17.