I love Hobbs wool. You can get it by the yard in at least a 90 in width but you have to look around for someone who sells it by the yard instead of packaged. I ordered 2 yards recently but can't remember where. It's great for both hand and machine quilting and has a nice loft that helps show off your quilting. I also use it with warm and natural or w&w to add loft.
I have not washed in the machine yet but have done small pieces by hand in warm and cold water with no problem.