Anyone got a British Military Stainless Steel waterbottle mug to sell or can tell me where to get one? I'm after the one that fits under the '58 pattern black plastic waterbottle and in the plain stainless steel finish. The current version is matt black inside and out and I don't know how long this finish would last on an open fire, using steel spoons etc. Ray Mears seems to be the only source for new ones - even the surplus shops that show them on their websites can't get these any more - but Mr Mears seems a bit pricey to me. Can anyone help?