Hi Chris,
If you want to use the SharePoint Workspace 2010 and don’t want to sign up to Office Profession Plus, you can purchase the SharePoint Workspace 2010 separately. Please refer to SharePoint Workspace2010.
For the second question, the BCM is unavailable to Office365 customer currently, here is the link of Business Contact Manager for Outlook 2010 for your reference.
Thanks,
Eben Liu