There is not a "charter" model shown in their catalogue, but if you go on their website www.plastimo.com products then safety you will find a page showing the re-arming kits. You can then identify the one you need. Almost all chandlers deal with Plastimo and can order it for you, but I guess many will have in stock.
You don't necessarily need a plastimo kit, as long as you can determine whether your jacket uses the United Moulders type or the Halkey-Roberts type. They look very similar but the threads do not match.