Hi sir,
I read your project description and understood what you need.
I can create your 3k pdf files with your unique ID and QR code on each one. If you'll provide the ID it will be fine, if not, I'll generate myself 3k unique IDs just let me know the lenght or other conditions for these IDs.
After all work is done, I'll deliver these 3k PDFs in any way you would like (dropbox or GDrive, i have both).
Best regards
Denisa Elena