Assuming the front sight is integral drifting the front sight it is not an option.
In general shimming is more for vertical adjustment than windage and done on scope mounts.
I supposed you could try to shim the right side of a tang sight, but depending upon just how far off right it shoots it may not be nearly enough.
A better solution would be for you to try your "second" tang sight that has windage adjustments.
There are $50-75 options that'll do the job. Williams, Redfied, Lyman all made receiver sights that utilize the tang mount holes.
Might even be some members here that have one available. ??
