If your handy with a sewing machine and a pair of scissors you could make your own custom blacket by just purchasing the material directly;

http://www.rockywoods.com/Fabrics-Hardwa...opper-Real-Teal


Or by using a pattern make your own 'bod-i-bag'

http://www.bodibag.com/diy.php

using the Gore Windstopper material.