PDF to PJR Conversion for Editing

I need a PDF file converted to PJR format for editing purposes. The PJR file will need to be modified in terms of text, images and annotations.

Ideal skills and experience for this job include:
- Proficiency in PDF to PJR conversion
- Experience with editing PJR files
- Familiarity with editing text, images, and annotations in PJR format

Please note that the specific software I prefer for editing the PJR file is ET.