I'm going through the same process with a cabriolet. Problem with the SoCal cars is that people drive them all day every day and pile the miles on. I recommend expanding your search geographically. Get a PPI remotely. Fly out, drive home. Easy. Get to know your car on the way home.
That will wrap up this process for you much more quickly. You can find PPI shops here and on Bimmerforums. Even Yelp rates shops now.
Last edited by dcdude68; 09-29-2012 at 12:44 PM.