Hi game mate,
I think the only way to find that object in Dawnport is by dying at lvl 6 and reaching again lvl 5. If this happens you are teleported again to Dwanport and everything is deleted but your stuff in the depot. If you have that object in the depot, you can throw it in the streets of Dawnport.
Extract from Tibia Wiki Fandom:
Due to the loss of experience points upon death, every player whose total amount experience points fall below 1500, which would normally cause a downgrade from level 6 to level 5, will get their level reset to level 1 and will have to start all over with the character on Dawnport again. This is also known as "rooking". All possessions except those in the character's depots, including his Bank Account and spells are deleted upon being rooked.
You can find it here.
I hope it can help you.
UPDATE: As pointed out by