I was wrong, its 610 at www.4wheelparts.com, but they have a $25 handling fee.
About the free shipping, I don't know of a single person that bought theirs during a non-free shipping week. Halo, woodchuck, and I all bought ours during seperate cycles of free shipping. It sounds like a cycling gimmick that they use. So I wouldn't worry about it if you can't get an order in today.