To be clear, the OP's referring to
https://www.arb.ca.gov/msprog/carpool/carpool.htm. That is weird.
An old snapshot made in late 2012 lists the 2012 Tesla Model S and S3:
Eligible Vehicles - Single Occupant Carpool Lane Use Stickers.
Does it really matter at this point? If a '12 Model S has already been issued a CA HOV sticker, it will expire 1/1/19 and won't be eligible for another. If you want a used EV/PHEV and the sticker, you'd need to get a qualifying EV/PHEV which has never been issued an HOV sticker.