Reviewing through your inquiry the Jive for Office add-ons can be found here: Jive for Office
However, I am unfamiliar with the "bridges module." Can you provide a screenshot or link to where you have seen this module mentioned? Additionally, can you confirm the version of Jive you are presently running?
Using the JIVE for Office link, it did provide me with the documentation, but I did not see the ability to download the JAR.