hey dan sorry to hear about what happened, i'll definately keep a look out for anyone selling your system by the sounds of it they would have done a rough job so theres probably some scratches on it wouldnt b too hard to identify it.
also i 2nd the join the bandwagon to bash these guys heads in!...
and just be happy you still have the cars..atleast you have somthing to still look at even if it depresses u, better than looking at an empty spot..