wowo. That is expensive. My dear friend gave me an old, and probably expensive comforter from her mom. It was 80's style but super warm. I'm guessing it had this wool batting. I re-covered it with a pieced top and some 15 years later it's still the warmest thing ever.
I've also used old electric blankets for batting and backing (with the wires removed obviously). The ones with the batting used as the backing are my snuggles that I always keep close by.