Invoice Presentation, BPA and Reporting Views

Hello,

We are currently implementing R12 and have a few different requirements that do not seem to fit within the standard functionality in R12.

1. We need to be able to combine certain invoices based on the PO/Contract number - BFB will only do it at the site level and the Contract Number for us is a DFF while the PO number is more of a Free-Text field in the system.

2. We need to ensure that the invoice line description matches the customer PO descriptions - it currently contains the internal kit descriptions.

Is there anyway to achieve either of these through BPA ? If not, has anyone used an external invoice print program that uses Oracle's AR reporting views and is more flexible as far as invoice grouping and presentation is concerned?