If you are still looking for a possible solution, check out the following workflow:
- Convert Shapefile to KML
- Google Earth Pro or KML Converter (Online Converter) - http://www.mapsdata.co.uk/online-file-converter/#kml-instructions
- Convert KML to DXF
- KML Tools (Online Converter) - http://kmltools.appspot.com/
- Import DXF into SketchUp.
I hope this helps
Chris