I got mine at Joanne's. I used the Perle Cotton, in balls instead of hanks. I've never had a problem with it, and have done a load of bead crochet & bead knitting with it.
I've got a bunch that I'm thinking of selling, though, since I've moved away from the technique and just have to make some room in this studio. If you'd like to trade for something, then I'd be happy to send it to you instead.