I'm not sure on The safari version but on The 9.3 version you Get 20gauge for 22 000kr in norway, thats around 2000-2500 dollar.
And you can Get combination barrel "cape gun" for 33 000kr in norway, thats 5000-5500 dollar Hehe, and then its 20gauge and from 6x65r-9.3x74r i Think.

So you dont Get 12 gauge on The smaller merkel.