FWIW A quick fix in the field can be done by simply wrapping some insulation tape around the rifle at the appropriate spot. - but as Mike says, a riflesmith should be able to fix it within a few minutes.

I had the same problem with one of my rifles and a buddy of mine made me an extended magazine box. He put an allen bolt on the floorplate, which I can undo it for cleaning etc but the rest of the time I just cycle the rounds through the action....... works a treat, and as I spend weeks and sometimes months without unloading my magazine it's the perfect solution for me........