It sucks being a prisoner to subs, doesn't it? I went through a kind of similar thing, and it turned into an eye opening experience. You see, sub maintenance is a business and it's just about the money. In CA, what you will likely need to do is find a new sub Dr (aka a provider, or Reckitt Benckiser business associate) and "enroll" in a new "maintenance program" and get a new Rx valid for CA. Also, these Reckitt Benckiser business associates only accept cash. After all, in their mind, sub users are low life scum and so they treat their customers as such. (I didn't really realize this until I was in your shoes awhile ago). I found it very humiliating.
It's going to be a bitch trying to find a place in CA who takes insurance. I have very good health insurance and I contacted every single sub Dr in So Calif who was on their list and every single one "was full", not taking any more patients because by law Drs are allowed a certain amount of patients. I wish I had better news, but you might be in for some eye opening experiences. When I went through this, it was a wake up call.
In the short term, what you can do is find an "alternative pharmacy" that does carry and prescribe the stuff. The mainstream pharmacies are not the right ones to go to. Long term though, I'm afraid your going to be stuck for awhile as a cash paying customer to the Reckitt Benckiser empire using the brand label buprenorphine until you find a Dr who takes your insurance with an opening for new enrollees. It really sucks being a prisoner to subs. Buen suerte.
Sub free since June 4, 2015