Recreating setback corner fillets

Anyone have any suggestions for manually recreating the corner blend generated when using the setback parameters in a fillet where 3 edges come together to a point. My part geometry prevents me from adding the fillet to the three edges at the same time, which is required to use the setback option. I would like to manually recreate the same effect after applying the fillets individually to the three edges.

SolidworksSurfacing