I recently picked up an amazingly clear Bushnell 3/4" 22 scope. I want to mount it on an older Remington bolt with a grooved receiver, you can't find old style 22 rings for love or money!
I finally found an outfit called grubee Inc online that sells a nice pair for $29 shipped. They also sell a reproduction of the old Redfield 3/4 rimfire scope for $159. Just a heads up for those looking for these.