Sorry if this is spamming you all, but here's the response I just received directly from the relevant staff at SFO:
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Teresa Whinery from [the SFO] Landside Team provided the information below that may be helpful to you:
During the T3 West Modernization Project, charter bus loading zones are located in the following locations, in the green-and-white striped zones:
Drop-Off:
Terminal 1: No change. Located at start of center island departures level near Door 1.
Terminal 2: Located at the inner curb at the end of Terminal 1, near Door 8.
Note: Due to crossover locations, charter vehicles cannot stop at both the T1 and T2 drop-off zones on the same trip.
Terminal 3: Center Island, shared zone with Airporters
Pick-Up:
Terminal 1: Courtyard 1
Terminal 3: Located at the inner curb, door 11/12. Must cross-over at the T2 crossover in order to reach inner curb.
For all curbside pick-ups, please only proceed to the curbside zone once you have confirmed the party is ready and waiting with bags in-hand.
If you have any other questions, you may contact Teresa via email at Teresa.Whinery@flysfo.com.
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Best,
Jason