I have a 800 page plus doc that are product cards. The client now needs a graphics reorder number that is unique on each card that will be provided in an excel doc. The indesign file has already been created with each page laid out and approved except for this missing reorder number which will finish the approval process. Is there an automated way to fill these numbers in. Each page of the doc will get a unique 8 digit number provide by the client. The location for the number on the file is on its own layer.