Looking for the impossible - An original barrel for a P35 Radom

I just purchased an FB Radom Viz 35 and when it arrived, it became obvious that the barrel had something welded in it at some point to render it unusable, but then it appears to have been hammered out. Barrell is completely unusable due to the welding slag left in it. To be fair, the online retailer has agreed to refund me 100% when I return it, but it is in very nice shape and I would MUCH prefer to try to find a replacement barrel. Any hope of locating one? An original mag would be nice too, please let me know if you can assist