Importing OCG sets in the card collection

Hi! I would like to import the "Starter Box" (OCG release date: March 18th, 1999) into the card collection, but apparently only TCG sets can be imported. Since the OCG sets are already on the database, could you please make it possible for us to import those sets as well? Some cards from those old sets haven't been released in the TCG yet and there's no way to import them into the card collection. Thank you very much!