A buddy of mine tried to get a Honda shipped to CA a few weeks ago, he could find the Honda EU2200i which WAS the CA approved model but nobody would ship to CA. A little further research turned up info that Honda apparently violated some CA CARB deal and is getting their hand slapped, I cannot say exactly what this means for the future availability of Honda generators in CA but I am certain this is at the root of the issue.
https://ww2.arb.ca.gov/sites/default..._co_inc_sa.pdf
That said, make a drive out of state and get what you want. CA is run by idiots currently. A decade ago you had to go to Nevada or Arizona to get a toilet that flush properly as CA banned higher water consuming toilets. Now days you need to go out of state for toilets, shower heads, ammo, generators and gas powered lawn mowers and leaf blowers!
It's OK though, I am certain CA will approve the new plug in generator any day now to solve all our power problems. ;-)