This is who I used, 6 different colors, they had free shipping, don't know if they still do, fast delivery, thick pelt, $70. My wife and I like it a lot.
http://www.sheepskin.com/viewItem.asp?It....Desc=&Sea rch=N
I don't know if one pelt is better than the other but we've been on this one two years, in rain and shine, and it still looks like new.