Adams Aviation will have most of them
online shop is
http://www.adamsdirect.co.uk/
other is Airparts, they are also uk based, the main site is
http://www.airparts.com/
also try
RD Aviation that is part of AFE now see
http://www.airplan.u-net.com/afe_wnew.html
or Pooleys
http://www.pooleys.com/
Lifejackets try ebay you get lots of them for sale cheap, also might have a discharged BCF lying about.... will be red though