I have not tested this outside of comparing the gcode between SuperSlicer and Cura. Values were within 1mm of of each corresponding value.
I don't know python and have no interest in learning it, hopefully someone can clean this up.
START_PRINT BED_TEMP={material_bed_temperature_layer_0} EXTRUDER_TEMP={material_print_temperature_layer_0} AREA_START_X=%MINX% AREA_START_Y=%MINY% AREA_END_X=%MAXX% AREA_END_Y=%MAXY%
Hey @PhilBaz as this is a bit of a hack, you need to put it directly in C:\Program Files\Ultimaker Cura 4.13.1\plugins\PostProcessingPlugin\scripts.
I'm not sure how Cura mounts these script, you could try first putting it in and see if it pick it up.
C:\Users\xxx\AppData\Roaming\cura\4.13\plugins\PostProcessingPlugin\scripts