It's pretty bulky so it isn't cheap, and you have to physically bend it open to get it on, then closed to make it tight again (although repeated bending does not seem to have any ill-effects so far). If you want to purchase one you can do so at the Shapeways link below. Or you can download my file from Thingiverse and print one for free on your own machine!
Thingiverse link: http://www.thingiverse.com/thing:288182
Shapeways link: http://www.shapeways.com/model/1860381/pentagonal-hexacontahedron-bracelet.html
Settings: For printing yourself, see Day 218. For Shapeways, just choose the metal that you want and they will do the rest.
