Delkim Bite Alarms

Can anyone help?

I did have 3(MK1? - not the optonic conversion) Delkim bite Alarms I now appear to have lost/ had one removed and cannot for the life of me find a replacement - I have tried Ebay etc without success. Can anyone adivse of any tackle shops that may have some or where I could try further.
Yellow LED would be good but I'm not fussy.
Thanks

Martin

Found this delkim with an amber LED on EBAY, sorry don't know the difference between MK1's and others.

7160035975 put this number in the ebay search engine.

Hope its the right one for you.