That's awful. I'm no expert but here's what happened with my bike. After it was stolen the police made a report which included serial number I had on a build slip. Later I stumbled on my bike in a bike shop. The police report with the frame s/n helped me get my bike back. The shop owner claimed to have purchased it from a pawn shop, which may or may not be true. So my advice is document your loss and keep your eyes open. BTW I was mad also, even after recovering my bike. I hope you get the Surly back, but either way don't let it get you down.