Pendant Remote Control - Where to buy

[Jon Whiten <jon.whiten@xxxxxxxxx>]

Looking to make up a radio controlled alarm - press a button on a
remote and the thing goes off - cancel by pressing a button on the
receiver.  The thing is, I am looking for one of those transmitters
that are worn around the neck by older people as an emergency device
(or watch mounted?).  I guess this is some sort of "Independent
living" thing.

Does anybody know where I could source something like this from so I
can integrate it into my own system?

Any and all help appreciated.

Jon