REI has several backpacking pillows here. You spec'd full-size. Take a look at their NEMO pillow. Says expands to full-size pillow, but packs down to smaller than 1-liter bottle. 10.8 oz ... for lot less than $185.
REI has a nice range of pillows but I would most likely stay away from the inflatable designs such NEMO even though it is a partial inflatable design. The medium sized Quixote Goose Down Pillow - Medium looks good but again is pretty expensive at $69. It is lightweight at 8oz.
http://www.rei.com/product/766379The Quixote Goose Down - large is available here. Again pretty lightweight at 13oz
http://www.amazon.com/gp/product/B0019ODVDE/ref=ord_cart_shr?ie=UTF8&m=A1ZM0PVL8ZKS9Pbut again is expensive at $99.