From "The WEIRDEST ADDONS For Flight Simulators | Turboprop FS, X-Plane 12" (December 29 2023)

TFS: Spy balloon & Missile: included in TFS New Planes Mod (check here)

X-Plane:

1. Go to the website with addon you need: 74447 | KFCraft | Quetzalcoatlus

2. Download the .rar file

3. Extract the folder into the X-Plane/Aircraft/Addon's name folder

4. Done! Enjoy your addons for X-Plane.