I am not seeing much on UA on either Thursday or Friday in the premium cabins.
On Monday I am seeing premium space on the over the water segments on the following flights.
UA 396 HNLSFO
UA 825 LIHLAX
UA 1736 OGGSFO
UA 1724 KOASFO
If you catch one of the flights to SFO you shouldn't have much difficulty finding award space down to LAX.