I avoid malls, so it has been a while since I have been to one, but I usually see these in the Discovery or Science stores in your upscale malls. The only place I can guarantee you will find one is in the Scientific American Store up in Milwaukee.
Why do you need one and how fast? I ask the why because I am knee deep in homework with the daughter so I am thinking you might need it for school for some reason. Grace
Thanks Hught, Grace, I found one, had to do some driving but I needed one for a little boys birthday,