PayPal transactions from the old ecommerce website (which also used PayPal standard), allow you to create a shipping label from within PayPal. This is part of the current workflow for SPD staff when fulfilling orders. Orders created from the new website do not allow you to print the label (because there is no shipping address associated with them). Search Drupal Commerce PayPal module issue queues or other forums to see if anyone else has reported this and if there is a way to make it do so. Perhaps one of the other PayPal payment methods would work?