Although they are not organic, I have gotten 100% wool blankets from Harbor Freight. At that time they were selling for about $12 and some change. At least it would help in short term until you were able to spend more for the organic. Also, has anyone looked into using kombucha scoby "leather" as an added layer of protection for windows? Not sure how well that would hold up due to the moisture, but hey.. Just a thought.