Am I correct to assume that you have the AAPK assigned item number from sale notification?
Login to the seller dashboard & click one of the two links shown in the image below. All of your in stock & out of stock items will show up. Out of stock items will show up after in stock items (they are first sorted by stock status).
In your case, since you have less than 50 items listed; scroll all the way down & the item you are looking for will be there showing with 0 inventory.
If you had more than 50 items, you may have needed to go to page 2, 3, 4, or 5... etc...
Please let me know if that works.