Send a copy of the PO to requester and/or Entered by

We have a requirement to send a copy of the dispatched purchase order to some requesters and/or entered by person (if different). The printed purchase order releases the supplier to start the work, but there's no notification to the requester/entered by that the purchase order was dispatched to the supplier- unless they look up the requisition in the manage requisition page daily. Our Procurement folks are currently doing a one time email address on the PO to themselves and the supplier then forwarding the purchase order received to the business. If we could systematically accomplish this with existing processes- real time, it would save folks time and effort.