Hard to find these nowadays. Ritchey wcs curved Aluminium bar ends, ultralight at 94 grams the pair.
Ritchey WCS Headset Cartridge Bearing: 51.9/40/8mm 45°/45
Ritchey WCS Carbon 1-Bolt Rail Clamps: Black 8mm x 8.5mm
Ritchey WCS 1 Bolt Carbon Seatpost Replacement Clamps - 7 x 9.6mm or 8 x 8.5mm
Ritchey WCS C220 Stem: Blatte 90mm, Black
YINETTECH 2x Bicycle Headset Cartridge Bearing 45°x45° 55050007031 Compatible with Ritchey WCS
Ritchey WCS 1-Bolt Seatpost Clamp Adaptors,7x9.6mm
