To cut a long story short, when my sports racing car was stolen, I got in touch with my local paper and they ran an article headlining my £5000 reward for information leading to blah blah blah.
Within a week, my doorstep contained a shifty looking pikey cove telling me that the trailer was gone (funnily enough!) but he knew where my (almost useless to him) car was and he didn't want £5k, but a grand would be fine if I didn't involve the police.
So, a grand later, my car was back in my hands and, yes - I know I paid the person who stole it to give it back to me - but so what!
I had my car back for a 50th of the cost of its replacement.
Maybe worth a try.