Yippee, I found a little cashmere and yak. The staple lengths are sooo short. I had to spin the spindle really fast to get a sample spin.(still way easier than cotton). I found the yak slightly easier to do a sample than the cashmere. I think if I prepared either in rolag form they would be better. When find some hand cards I will give that a try.
Here is the cashmere:
Here is the yak