My Oring kits contain:

Smallest O-ring (4x): For secunday mainjet (the small tube that is under the main jet). (#27)
Second O-ring (4x): Float seat (#2)
Third O-ring (4x): Seal for inlet manifold (9)
Largest O-ring (4x): Float chamber body (for mounting use a tiny bit of fluid gasket)

Kits are US$10 each, I accept Paypal

Order here