Closest thing I can think of off-hand would be to set it up in Fusion360 as a CNC operation with a V engrave bit set to the focal cone angle. Use the engrave function, then modify the Z values from negative to positive so it goes up instead of down for thicker lines. This is only just speculative, but I have done some non-planar work like this before.
Would still be a lot of finishing work on the gcode though.