These are the sizes you'll need

Valve seal 6.0 x 2 xxxx OPN 2490021
Bolt 4.0 x 1 OPN 2472309
Barrel seals 9.0 x 1.5 OPN 2472295
Cylinder Seal 14.0 x 3 xxxx OPN 2459817
Cylinder fitting 15.0 x 2 OPN 2476266

OPN = Original part number
xxxx = These must be Polyurethane as in constant CO2 contact