Hi dave.mcconnell,
Welcome to the Mattress Forum! 
I noticed that you registered with your email address. You may wish to adjust your profile to remove this, as the automated bots that comb through sites can gather your email and use that for their own spamming.
The following is a bit of an extensive list, but subject to confirming that any retailer or manufacturer on the list is completely transparent (see this article) and to making sure that any mattress you are considering meets your specific criteria and the quality/value guidelines here … the better options or possibilities I’m aware of in and around the San Francisco/San Rafael/Oakland/Berkeley areas are listed in post #2 here.
If you don’t find anything in your local area, you may wish to contact some of the vendors in the component post here.
Good luck!
Phoenix