However, the inverse is also true - California doesn't have the right to dictate standards (and prices) to the rest of the US. A dual standard would absolutely impact people in the rest of the country. There is a clear interstate commerce issue here, and a clear justification for a national standard.
California law is NOT applicable outside of California (unless some other state's legislature adopts the provisions in it) so no California law "dictates" to anyone outside of California.
The automakers have VOLUNTARILY decided that they want to have a place in the California automobile market - California didn't "dictate" that they MUST participate in the California automobile market.
The automakers have VOLUNTARILY decided that, since the do want to have a place in the California automobile market they would manufacture vehicles which could be sold, legally, in California - California didn't "dictate" that they MUST manufacture vehicles which could be sold, legally, in California.
The automakers have VOLUNTARILY decided that they would NOT make different versions of the same vehicle (one version which could be sold, legally, in California and one that could not - California didn't "dictate" that they MUST NOT make different versions of the same vehicle (one version which could be sold, legally, in California and one that could not.
The automakers made those VOLUNTARILY decisions because they wanted to maximize their own profits - California didn't "dictate" that they MUST maximize their own profits.
What you are, in fact, complaining about is the fact that corporate executives made market (read as "profit") driven decisions that you don't like.
Since that is the case, the appropriate course of action for you is to mobilize a mass up-welling of popular support for a movement to boycott any automaker which [a] manufactures vehicles which are in compliance with the laws of California AND
does NOT manufacture another version of the same vehicle that is NOT in compliance with the laws of California. Possibly one of your objectives should be to convince your state legislature to impose an additional tax on vehicles which ARE in compliance with the laws of California because the one sure thing that that will do is cause the automakers to manufacture vehicles which are NOT in compliance with the laws of California (provided that they don't VOLUNTARILY decide that they simply cannot be bothered to take part in the automobile market in your state).