Customize the Sourcing Report (External Supplier view)

I need to change the layout of the the sourcing report (Supplier External View) and add the compnay logo. This I can do by customizing the PON_SOURCING_XSLFO.xsl stylesheet in BI Publisher.

I also need to add additional fields into the report and to change the word "auction" to "bid" in the data source of the report. I'm unable to find the view object associated with the PON_SOURCING_XSLFO.xsl template.

Can anybody please guide me in the direction of what VO i must extend to add the additional fields to the view object.

Regards