Where can I find Kureyon or similar yarns for cheap?

[Danielle]

I'm looking for noro kureyon or similar self striping yarn to make a booga bag for part of a friend's Christmas gift. Preferably less than $6 a ball. All the places near me are selling kureyon for anywhere between $7.50 and $9. Any suggestions? I've thought about doing it in WOTA with several different colors, but I really like the way the kureyon stripes knit up. (My friend *loved* my booga done in kureyon, so that's what I want to do for hers). TIA! :D