For sale (because I sold the lens) and these dont fit anymore.
Magic filters http://www.magic-filters.com
Set of 2 green water filters (thrown away one because I damaged it dropping it in the muck) -> 20 euro's
Set of 3 blue water filters (never used, just opened to see if they were still there) -> 30 euro's
(new price = 35 pounds for 3)
Can send anywhere for 1-2 euro's, unless I have to insure (have to look that up).