Single SKU / Alt Bom is Not Acceptable

Customer builds a product with different materials

i.e. Two different types of plastic

Customers in different countries have requirement for specific plastic

i.e. Korea (plastic

      Indonesia (plastic C)

      Other countries no requirement (they can use either)

Currently they have created 3 different items

Item A

Item B (built with Plastic

Item C (built with Plastic C)

Then the cross reference the items

     Item B -> Item A

     Item C -> Item A

When customer orders the order entry clerk has to know the customer country to determine the item to order

Customer is looking for alternate more automated way to accomplish this.