You can find all the replacement parts you need at Escapa.
Union CB-720 Headset Bearing 30.15x41.5x6.5 36/36
Features:
-Dimensions: 30.15 x 41.5 x 6.5 mm, 36°/36°
- Outer and inner rings: CrMo
- Balls: CrMO (HRC61-66)
- Cage: Nylon
- Seals: LLU rubber (full Contact)
- Grease: Multemp SRL (Kyodo Yushi)
- Tolerance: ABEC-3
