Don't know what area you are in, I use the Arco station on Franklin and Gower in Hollywood, competent A/C guy there and reasonable prices. For a real specialist, look in Yellow Pages for A/C shop on Beverly near Rampart, (can't remember name), or one in your area. R12 is not a problem to find, just getting expensive. Good luck, the Arco always has best price on freon, just make sure that you are getting real R12, not "freeze12", or whatever it's called.