Sog has got the Advanced Technology mount for $33 comes with the drill and tap
As Swamp says with a calipers to get it sentered up, the rifles are pretty soft and drill & tap easy. You can glue the mount on with epox and use the two drill method in the instructions, but i think using the right transfer punch to get the holes centered in the mount is the only way to go.
I don't really like the bolt handle installed with the screw, I think it would look a lot better welded on