They are for sale once again @ 4 Wheel parts. Unfortunately they are not $20 for a 3x30'.. it now cost $30 for a 3x30.
http://www.4wheelparts.com/4wp/products/productLine.asp?cat=SUS&prodline=463&catName=Suspension&man=PRO&parentProdline=SusAccPRO&expand=sub7

Wow, what a price jump from the $30.00 3"x30' to the $89.00 4"x30'. $59.00 more for an extra inch of width?