As a PSD I have lost a few and dont want to spend lots of $ for them. when they are gone, they are gone. For $9.oo I think you cannot beat what we have put together As could no longer find them therefore we put these together for the dive community. see at http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160392198913&ssPageName=STRK:MESELX:IT