hey freddiver..this subject was covered about a year or so back...and we could not find a source that soled them here in the U.S...i had gotten my bag when i was in the U.K. at silvermans surplus store,along with other kit...by the way the millbank bag is a water filter bag that helps with getting suspended matter out so you can use tabs etc,it's not a water holding bag... ask one of our British friends for help on this or do like i do and google surplus stores in the U.K. and find one....vince g. 11b inf..