Try www.eclinicmd.com they have a good Doc in Beverly Hills a frind of mine uses him. My only coment is your going into heavy weight territory if all you want is some Xanax. You might be better off usinf a IOP like these guys there good. http://buy-best-steroids.com
I agree that for just xanax, you would be better with an IOP. I don't have a particular one to recommend, but you can check that section on this site (international) to see who is best right now.
I get valium from my regular doctor, but he has been my doc for years. He wanted me to take an SSRI as well, so I did. Family doctors are great for getting valium.