That Boone is cool and the Lightfoot is functional, BUT that ebay link to the old Lyman is calling for a rifle like that. However,,,,, if the eyes won't let the target sharpen with the peep a mans got to do what a mans got to do.
The two I own are the receiver type on Marlins but the post type on a Savage is very cool. If the gun was a bit rougher cutting the wood to fit a 56 or other would be fine, but that rifle you found sure looks nice and I would not want to mess that up.
Looks like the search is on for a good deal on a sight.
Merry Christmas