Pulling PR's by sales order in me21n

Hey Gurus,

We have line items on a sales order that are different materials but are sourced from the same subcontractor. The business requirement is that me21n be able to aggregate these PR's into the PO by the sales order so that the users do not have to remember what the PR numbers were. Is there a slick way to do this in Me21n? I didn't see a good way of doing this by the sales order.