You can find all the components and replacement parts you need for your bike at Escapa.
Such as the FSA TH-874-1 1-1/8" Aluminum Headset with Cap
The FSA TH-874-1 1-1/8" Aluminum Headset with Cap consistsof:
Head cap, including the clamp and mounting screw
Fork mount for: 1-1/8"
Mounting width: 32 mm