Hob 'bout one of the William Malcolm models from HiLux, say the small short tube 3x model? Not sure about mounting system/rings, but would not look out of place on the rustic brassalite receiver.
I don't have a Henry, but my Marlin 1894c has a Leupold FX-II (2.5x20) scope. It's about as small as scopes get and doesn't hinder the looks and handling of a lever gun as much as larger scopes. The magnification is adequate for hunting and plinking. Not sure what your intended uses are.