How do you allow mulitple vendor material numbers on one Pinfo?

Is there a way to allow a Purchasing info record to have 2 vendor material numbers for the same item? The vendor has different material numbers for the same item because it is delivered to different countries. They are using the material number to help differentiate where the material is being sent. We have 2 different locations that use the same material and we are not able to have the Pinfo used by both since there is only one vendor material number on there - we have made the vendor material number required to ensure it is included on the purchase order.