If you are talking about the "Pyracue" at the 3D Puzzle Reconstruction Studio, I'm sure it is a Skewb modification. Their website shows some of their materials and techniques. http://puzzle3d.hp.infoseek.co.jp/
On the other hand, if you are talking about the "Pyraskewb", these are easily built by hybridizing a Skewb and a Skewb Diamond from Meffert's (http://mefferts.com/
) if you can get them with stickers.