I have used Hobbs. I love the poly down for a wash and wear quilt for it's puff. I use wool in all my own quilts.
Kingsmen Quilting has rolls. I like them because if I only need 70", I cut 70", so I don't have a lot of waste. Kingsmen quote you a shipping price but bill you what it costs. So here in Wisconsin the shipping is pretty cheap, never what the initial amount that is given says.
Oh what a coincidence. On PBS they are showing how Hobbs makes it.