On the basis that this is what you have https://www.evanscycles.com/scott-so...-bike-EV224268

One of these headset bearing should work https://www.chainreactioncycles.com/...g/rp-prod62162

You can pull your old bearing, and check the specs either by looking on the side for the laser etched marking, or use a vernier caliper to measure them.

Choose you preferred supplier depending on your location.