Seems there's been an Alchin stolen from Burton Latimer, so this seems a reasonable place to help publicise it.
I'm afraid it's a Facebook post, followed by a screenshot, but it's the best I can do. I appreciate that this will exclude many members, but it's the best I can do off the top of my head.
Text from FB post
"Could I ask you all please for any information as my mum and dads house was broken into last night along churchillway and ransacked,I'm heart broken there car has been stolen along with some very sentimental items one of which was my late grandfathers hand made alchin steam engine,this means a lot to my family and is this most valued item that has been taken,which had such great sentimental value please please keep an eye out for anything. Heart broken is an understatement please contact myself or police for anything regarding this incident. Please please share my parents are distraught"
There is a Model Traction engine forum site Here if you put your appeal on there you will cover a wide section of model traction engine owners who can look out for your engine at rallys etc. Mike.
EDIT by Mod, It has been on Traction talk for a day or two already so no need to post it again.