Air Canada has some super cheap business one way fare from KUL-LAX/SAN/SEA/SFO.
bookable on expedia.com, using multi city search.
the trip should under $1300 USD in total and free stopover permitted. I found if stopover in HKG, fare did not increase, if Stopover both SIN and HKG, fare increase by $200.
Another routing possible,
You can have stopover in SIN and SYD for total 1600 USD, without stopover, the fare is $200 cheaper. Please note you should select the SYD-SAN/LAX/SEA/SFO leg with connecting in Vancouver rather than AKL, because AC has no traffic right to sell you a ticket Between NZ-US(even it's operate by Air New Zealand) without touching Canada. Ticket can not be on AC 9507.
Update: More routing possible from KUL- US west coast via SIN and PVG, KIX, ICN, NRT with stopover permitted. Aslo it valid to US east coast with few hundred more.
Credit to Flyertalk