use old material revision in production order and determine bom accordingly

All experts,

We have product with old revision.Some of customer need old revision of it;some other customer need new version of it. We need produce this product according to customer requirement.

But I did not see a place for user to choose revision when create order from CO01.

May you have any hint about how sap could realize this? I believe its common some customer need this version and some need another version in real life.