Tableau connection to Eloqua

Hi all, i'm looking to connect Eloqua to tableau but there doesn't seem to be any standard database connection for it.

I came across a thread referring to a paid service from DataDirect Cloud that uses their ODBC driver to connect to Eloqua.

Eloqua and Tableau

Considering Tableau is using Eloqua as well and they even have their own dashboard example:

E-mail and CRM Analytics | Tableau Software

Has anyone else set up such a connection, and how did you do it