Aldis Scope Elevation Range Dial - Bottom Half Help

[hatrick]

One of my 1916 Aldis scopes that was previously a Purdey set up and had the elevation range dial swapped sometime after the war and I want to replace it with a reproduction 1-6 dial I have. Sadly the knob currently on it is not a two piece knob so I can’t put on the 1-6 dial. I thought the dial on there now was just turned upside down but no luck. I know this is a super long shot but does anyone have a spare bottom half Aldis dial like the one pictured. Any help would be a godsend.