The grain flow of the stocks don't match. Compare picture #4 with the picture on the second page of the American Rifleman article. Completely different grain flow. Also the gun pictures in the Am Rifleman has a recoil bolt, don't see any evidence of a repair to hide the hole on the Gunbroker pictures.
My .02-
I'd guess the stock on Gunbroker is a Minar (just not O'Connors Minar)and maybe the sloppy inletting is from the original barreled action and floorplate being replaced sometime in it's past.