From the photo I surmise that by "built in" you mean the wood was cut for the cast.
My Westley Richards has the tang bent to the right, starting just behind the fences which is beyond "built in", it is well nigh cast in steel.
In a restocking project (just to see if I could) the Wenig New American style proved itself. It gives the required face setoff with no cast of the main body of the stock. In case you ever think of restocking.
An inexpensive way to fix your problem is to add some material to the left side of the stock. Something undoable that will do no permanent harm to the wood. That long trigger guard and its fate during bending cause concern.
