I need some explanation as English is not my main language. If I understand you correctly, the background is always the same, just change the numbers on the 9 places in the document?
From 3300 to 3399 and 3400 to 3499; 3300 S to 3399 S and 3400 S to 3499 S.
Right?
If I'm right, then I can finish the job in half an hour. You just need to send me the background and tell me if you know which font is written.
My recommendation for this job forth the following: I have extensive experience with this kind of work. In the company where I ам employed, work with banks. Banks send us data base with thousands of customers that need to be put letters (name, address, post code, town, etc.) they are sent to the home address of the customer.
This is done using the InDesign Data merge.
I hope future cooperation.
Regards,
PaulLazar82