I'm not aware of an integration plugin for Metabus but you might want to display it in an iframe by using Products.windowZ or simply adding the tag in Document's rich text field (maybe you'll need to allow it in @@filter-controlpanel). Alternatively you could create a browser view to consume and display the results. You may contact the developers - since Interlegis is a heavy Plone user, they might have some recommendations: metabus@googlegroups.com.