Ah, OK. We have exactly the same scenario. No, sorry, you can't use standard in this case.
For the orders that come in by an IDoc interface we have a user exit with Z-table, as G.Lakshmipathi mentioned above, that takes the customer material # and identifies our own material #. The customer # is moved to the description, so that CSR, who further processes the order, could enter VC correctly (we can't add VC using the same interface). When entering the orders manually, the CSRs rely on the customer's description text or their previous knowledge to enter the order correctly. But you could probably do a user exit in similar fashion using Z-table.
There is no easy solution, unfortunately. Maybe in S/4HANA? One can always hope...