My friend's cat was stolen by neighbours who then moved across town. We found out where they lived and then designed and printed 20 or so A5 leaflets and posted them to every house in that street apart from where the thieves lived.
A lady down the road from the thieves read the leaflet, lured the cat into her house (with chicken) and called us. We got the cat back!!!! The lady didn't like cats - in fact they scared here, but she was a star. It's amazing how decent people can be over things.
The wording was something like this:
CAT STOLEN
Believed to be living now in Bloggs Street.
Description, etc. (Good photo)
Police have been notified.
Cash reward for safe return subject to ID chip verification at by a vet. (reward we gave was �50)
Please call: 000000000
I'm not sure if I can give out my e-mail address on here.. as I'd happily lay out the leaflet for you to print out at home.
The police consider cats as 'feral' animals so they're not interested in helping out - we explored all that side of things.
All the best,