Here's another great alternative for $10 at DSW. I just picked up a pair myself and they're super comfortable and well made! And, if you are DSW rewards members, those $10 off coupons totally work on this. I ended up getting mine for free! (hahaha, I know I sound like an infomercial, but seriously, these are a good knockoff as well)
http://www.dsw.com/accessories/sm+cable+knit+rain+boot+liner?prodId=230830&category=dsw12cat1480027
I know I will get super bored and want to change my welly color. This is perfect!