Depending on the make of your life jacket, and if we are talking about the same thing, which in my case, is a small round disc with salt in it, to re-arm your jacket, the last one I obtained, was seveal years ago from, Remploy at Poole 01202743445 Hope this helps?
Sounds like a Halkey-Roberts type to me. The little disc is known as a bobbin. What make is the LJ?
Various websites (inc Baltic I think) have pictures indentifying which model it is - usually confirmed by combination of bobbin and pin/clip. There is an expiry date on the bobbin, so check it on receipt. (Sorry - I don't have any HR spares now.)
JKY - there's only 3 main manufacturers of release mechanisms - HR as above, United Moulders and Hammar. As long as you get the right bits for your particular LJ, it doesn't really matter whose name is on the packet. As far as I know, all the gas bottles come from one Austrian factory.
If you're packing your gear away over the winter, make sure your lifejackets are rinsed off and dried before storage. Good idea to inflate manually (with a pump not your gob) and leave for 24 hours. Inspect seams and folds for any sign of wear. Check expiry date on auto release mechanisms. If there's a light packed inside, check operation and expiry date.
