An old file from my Pepakura making days that I discovered in Pepakura Designer you can export to .OBJ and in "Windows 10 3DBuilder or 123Design" export to .STL. Unfortunately I don't have the skills yet to improve further on the model, but maybe someone out there would like to tidy it up. Please upload it back as a remix if you do take the time to clean it up. Please note this was originally uploaded to the net as a free down load. So I cant take credit for whom actually made the file.
I've included the original .PDO to help http://www.thingiverse.com/Ody304/about in his quest to make ; )