Amazon.com : Neco Headset Expander Top Cap Star Nut Plug Bolt Stem Expanding Nut Bolt Carbon Fiber Cap Cover Long Large Size (Small Aluminum Cap 1 inch) : Sports & Outdoors
Bontrager Headset Expander Plug and Top Cap | Trek Bikes
FSA Compressor 1" Black Expander Plug and Top Cap - Supercross BMX
FSA Compressor 1-1/8 Expander Plug and Top Cap [160-3010] at BikeTiresDirect
Forza D-Shaped Long 60mm Head Set Expander Without Top Cap, Black | Bikeinn