Don't use a rail on that gun, it looks ugly that way. Simply get longer bases, or a longer-tubed scope.
Any Leupold fixed will work. Most "normal" 3-9 like a Burris Fullfield will work. A new Redfield Revolution will work.
Thank you, they are really nice, wood reminds me of older Sako L-61’s. That’s like putting a receiver hitch on a corvette.