DevOps, CI/CD and Automation

We have a requirement to change the seeded Standard PO output using XML Publisher in 11.5.10. The way I see it, we have three options:

This can be accomplished by creating a new RTF document, incorporating all of the logic and code, then export the file to XSL:FO using the XMPL Publisher Desktop 5.5 MS Word plug in. However, this will take a very large development effort, as well as hours and hours of testing to make sure that all of the seeded logic, positioning, etc. is correct.

Another option would be to edit, by hand, the xsl stylesheet using a text editor. Again, the large development effort is the hurdle. This particular stylesheet is almost 2800 lines long, and without any real formatting. The required output is with several tables (some nested), various fonts, and several different borders and regions. Possible with notepad, but VERY time consuming.

It seems that the best option is to edit the seeded standard PO layout (PO_STANDARD_XSLFO.xsl) template in a xsl editor. The problem is, this style sheet cannot be converted nor opened in any of the applications I have tried: JFOR 7.2.1, Apache's FOP 0.20.5, XMLMind FO Converter 2.2, Altova's Stylevision 2005 Enterprise Edition.

So we are at an impasse. Is there an Oracle tool that can open this file and generate an RTF document to use as a baseline? Is there any other tools that can convert this file to an RTF? Is the seeded document that Oracle used to generate the XSL:FO file available? Are there any other options?