they're expensive - but I have a set of BOSE
http://www.bose.com/controller?event...adphones_index
(I don't remember where I bought mine, but I bought the floor model for 1/2 price - -and are worth every penny- I use them on the plane all the time and it gets really quiet)
Most music stores have the noise reduction headphones, the ones I've seen are starting at 100 bucks