Yarn sub:Knit Picks Suri Dream

I’d like to make their Abundance afghan (http://www.knitpicks.com/projects/projects_display.aspx?itemid=50502220) just like their photo.

I waited too long, now the hand-dyed yarn isn’t available until 1/19/2007 (much to long after Christmas).

Is there another yarn I can substitute? I could try just using the plain colored ones if I’m desperate, but I really love the variegated colors especially since this pattern is so simple.