OK an update.
After many pings on Facebook they finally connected me with a luggage person. That person said:
I hereby kindly inform you that we could not find any report due delayed luggage or another one for your luggage under your name or the tag numbers that you provided us with.
The claim report due delayed luggage can only be filed by the passenger, at the closest airport (Aeroméxico counter) with your passport, boarding pass and tag number of the luggage.
Our colleagues will be pleased to help you and you will be given a reference (5 letters and 5 numbers). If you send us that reference, we can provide you with the information available on our system.
We are at your service for further assistance.
So off to SFO I went. There does not seem to be an AM baggage claim office or anything there. I asked an information person and she told me to go to the AM check in counter, which I did. There they immediately thought they'd have my bag in a back room which they checked but returned from empty handed.
They filled out a "baggage claim" form which they stuck my luggage tag to. I asked if there was any sort of tracking number and they said no that they don't do that. I even showed him the message from the Aeromexico person saying it should have 5 letters and 5 numbers and he repeated they don't do that. They did provide me with local SFO contact info for them:
ATOSFOLOSTFOUND at aeromexico dotttt com
(650) 821-1122
Putting that here in case anybody else has this issue.
I asked the guy how often people get their luggage back and he seemed to think everybody gets theirs back. I have my doubts, but we'll see. He said I should hear back later today or tomorrow by both phone and email.
Crossing my fingers.