Thanks for your inquiry.
Unfortunately, there is no way to get an older version of Aspose.Words. You can get only version of Aspose.Words that is not older than one year. Moreover, I would suggest you to please always use the latest version of Aspose.Words. However, you can download Aspose.Words v13.1 from the following link:
If we can help you with anything else, please feel free to ask.