Credits go to Bsimai from Deathsoft
1. Make a new character.
2. Go to the donation shop.
3. Click on Review Item under Vanity Pets - Uncommon.
4. Click on one of the blank circles next to any one of the pets.
5. Start tamper.
6. Click Buy Item.
7. Click tamper.
8. Modify the upper-rightmost value in the Tamper Data window to the item ID you want. Type in 500 for WoWTorn Shirt.
9. Click submit. (You should have two less donation points.)
10. Relog in the game.
11. Equip your shirt.
12. Talk to Aeroplane.
13. Click on Elite Donor Options.