To me a scope is just a centerline taper on a straight tube, which is a well used sheet metal fitting in my trade. The layout is easy, some math involved, but I guarantee a perfect fit(if choosing to go with a wrap of some kind)one time and no trial and error of fit, snip, and refit, and get it as close as possible. As you all know, getting close “isn’t perfect.
If interested, send me a pm.