Hi there,
... and, while I'm sorry to see that you have joined us because of your unfortunate mishap, may I also offer you a warm welcome to the Coffee Shop forum, orjennings.
As others have suggested above, the best idea is for you to keep trying to track down your lost property, at the various lost property offices. Realistically, the railways have more 'found property' than they can cope with, so it's not reasonable to expect any of them to trace your particular item.
I really hope you get a result, sooner rather than later.