Just an idea that may work.

OK so the blade is off center because it’s warped or ground off center; in any case there is nothing you can do to straighten the hardened steel blade.
However if you are making NEW sales for such a blade you could try this…

When you pin the wedge end, don’t tighten, leave it a little loose. Then pin the pivot and tighten as normal.
Now because the wedge is loose you can now “adjust” the wedge end one way or the other and center the blade, then carefully peen to tighten the wedge and hopefully the blade will remain centered.