I think there is a real question as to whether things like that were ever made or are made now. D_MAN made one up for his Hakim 8 and I have been looking for one for my Ljungman 6.5 (same style action) but without any luck.
I think you would have to take the rifle to a gunsmith and have a sight base made to specifically fit your rifle. Then mount a scope and rings to it.
My Ljungman came with 3 holes drilled and tapped, just under the stock on the left side of the action, right where you would mount a scope base but I have never been able to find one. I am sure they are out there but it is beyond me as to how and where to find information about them. I hope someone with more functional brain matter than I have can chime in with some good advice. Mikey.