Sorry Mr. Ferree, At the time I did my review I failed to check for empty drill boxes. I am not currently there to review current inventory. I suggest it may become necessary to make contact with the store itself. Although maybe a reviewer will reply with the current inventory as you require.
I doubt that they would stock any empty box. It would not be good for overall productivity and a waste of space which would result in a loss of money. I would call and ask when the next shipment would be and see if there is one available at that time.
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