This website from the county shows some boundaries and it is public data: https://perkins.gworks.com/

I don't see a way to export the data, but you can add it as a custom background layer in iD Editor with this:

https://gis2.gworks.com/arcgis/rest/services/Perkins_County_NE_PZ/MapServer/export?F=image&FORMAT=PNG32&TRANSPARENT=true&token=&LAYERS=show%3A0%2C2%2C3%2C5&SIZE={width}%2C{height}&BBOX={bbox}&BBOXSR=3857&IMAGESR=3857&DPI=90