I was talking to one of my local smith's that's interested in making a Mount for it.
I ordered a 200mm length of picatinny rail and the plan is to remove the rear sight and machine about 100mm-150mm of the rail it have a lug that will sit into the recess.
Then machine the centre of the rail so it has sort of rear sight the same height as the current notch so it should shoot normally without the scope still.
Then tap two additional screws into the 1/4 rib.

That's should give me the option to shoot it as us, with a red dot or with a 1-4 Leupold spot hog scope.