Have always had a hard time with the much touted special properties of trilobal antron, but if you need the "real thing," it is still available through the BookMailer (http://www.thebookmailer.com/Supplies/SparkleYarn.html). I use Caron yarn as well, but it is hard to find in the right colors and I hate ending up with huge piles of skeins just to tie a few patterns. While relatively expensive, the BookMailer has the right colors in more manageable amounts. As far as effectiveness, any acrylic yarn will work, in my experience.