PurchaseOrderEmail definition

The Customer uses the PurchaseOrderEmail definition with a Live PO and Supplier. By checking the box, Supplier Purchase Contact, and setting up a Purchase contact the PO gets sent to the Supplier. However, the customer would also like a copy to go to the user who created or printed the PO. If they check the box for Purchaser, then every user who has permission to print POs gets a copy. They can't add the requester to the definition because they have several buyers.