Emailing PO's to supplier via buyer automatically while giving supplier AR departtment access to inv

Before iSupplier was turned on, we would enter the email address on the Approval form when approving a PO and the buyer would get the PDF PO emailed to him. He would review it and then send it to the supplier.

Now with iSupplier turned on, we have added under the Contact Directory, the AR people from the Supplier who want to view invoices on-line via iSupplier. this also automatically enables the sending of all PO email notifications to not just the buyer but now these AR people. To stop these emails, we have turned off the email notification at the supplier site level. However, this creates a different problem where the buyer no longer gets the PDF PO emailed to him since we turned off email notification.