Old Style Condor Stock??

[Festus33]

I'm presently trying to ReStock a friends old K-Mart/Boito O/U 12 ga., My Question is Will the Old Style Condor Stock fit this Gun. My new style Condor Stock is close, but not Quite right. The Scallop's/Humps at the front of the stock don't fill the cut's in the back of the receiver. Can Anyone tell Me Definitively if this is the Difference between the Old style and the New style Stock's. Numrich Gun Part's no longer has any Boito Stock's on hand, So I'm trying to find an alternative Route to get this Gun back in Good working order for My buddy.
If anybody can help Me with this, I'll just Say Thank's Now