Longines beads-of-rice bracelet help needed.

Hi Guys
I have just examined my Longines Heritage Pilot's Chrono, last outing was at the Manchester GTG.
I found that a link pin has dropped out of the bracelet; one of the removeable links fortunately. Nowhere to be seen; I suspect sabotage. Fords was trying to get me to do a straight swap for his PP and he may have been peeved when I insisted he throw in a Rolex as well.
What do I do? Toddle off to The Watch Lab in Manchester? Are there generic link pins that would serve?
Alternatively, if anyone is revisiting the GTG venue, could they have a quick look in our room for a link pin.
I will post a photo in the next day or two.