you need:
Components - Crafting.
Green Crystal - Mining the green crystal at the mall.
Chemicals - at the medical store in the mall or at the hospital.
Rope - basically anywhere (easy to find)
Graphics Card - Tech store at the mall
Military radio - rare spawn (i think) at the military checkpoints or under the mall
Metal Can - Also kinda easy to find almost anywhere
How to craft the components:
Tape - Easy to find
Gyroscope - Demolition site
UPhone XIV - Tech store at the mall
Defibrillator battery - Medical store or hospital and medical zombie drop
Thats it.