When using the Special Handling/Bill Only Line Type, how can you suppress PO communication?

Summary:

We would like to use the Bill Only Line Type for confirming orders so that the Receipt automatically processes but the supplier MUST not get a copy of the PO as it results in duplicate shipments. Documentation and testing is showing that the "Override B2B Communication" at the supplier site ONLY suppresses communication for suppliers who are receiving PO's from OBN. All of the invoices in scope for this line type utilization are emailed and not being sent via OBN. We cannot remove communication methods from existing suppliers as a workaround. Our PO's are all on auto-po so no buyer