Module that offers reports to the customer

Is there any module that can offer reports to the customers: For example let's say if i have a directory submission service and i want my customer to receive in his account a report of the links where his website had been.
Does it exist?

For example: The customer purchases a service from me, let's say a directory submission service, and after the order is in status complete and money is received and i done my work, to let me, the admin upload a report (file: pdf, csv. xls, txt) to this order and let him see the report in the "account download area"?
Sorry for the bump.