For those on the curious side, get onto google maps and view the greater San Fernando/Los Angeles/Irvine area. Search for 'pawn shops'. Zoom in a ways and search again--more will pop up. They are all over the place. Add greater San Diego and even Las Vegas to the mix. There are a good number of coin shops as well.
Sincerely hope there's a good outcome just over the horizon.
Personally, I'd file a police report with as much info as I could provide. Receipts, pictures, emails, etc. The way I understand it, pawn shops on the up and up will enter descriptions of pawned items which are automatically cross referenced to police databases of reported stolen items. Hence the police report.
Assume you locate your stolen coins, who's to say they're yours and were really stolen?
pinkfl, one advantage of slabbed coins (and slabbing any of your good stuff slabbed) is having all of them itemised in your set registry. That way if the slabs are sold it is easy to show ownership, and if they are cracked out then the images (if they are decent) will show them to be yours.