good custom ones will cost about £100, as I lost one of mine I was looking into getting some new ones they should be replaced about every 4/5 years anyway, as I have severe tinnitus in left ear I have to get the best I can, found a place in London that I will go to when I need them, my old ones were made up at one of the mcn shows many years ago and I used them when at the cinema as its to loud for my left ear so now I have to use cheapo disposable ones.