i dont know where you can purchase Among the discard, because ive never heard of it. I did see a video of it on Youtube and thought it was interesting. One of my favorite sandwhich effects which is about as visual as you'll get is the Ishkabibble Sandwich by Eric Jones. You can find it in the 1-on-1 section here. you may have known that but i can't be too sure =) I hope this helped!!!
~Nate
Well it's a transposition type thing.... I vaguely remember a friend teaching me this.....something with a jordan count.... ugh I wish I could remember for you!