The closest thing that I can find to this is The North Face Mountain Parka. I spent $425. It is 700 fill and at the time it was between this parka and the FF Rock and Ice Parka that were being used by the Everest expeditions. I purchased for a trip to Ecuador it is Gore Dry Loft and is in great shape and still has its full loft and stored lofted.
I'm asking $200
Picture
Thanks
Jeff
jeff at jcady dot org