SS 4x4x4: http://www.amazon.com/Shengshou-4x4x4-Puzzle-Cube-Black/dp/B004UVJG7I/ref=sr_1_fkmr1_1?ie=UTF8&qid=1389580559&sr=8-1-fkmr1&keywords=shengshou+4x4x
QJ Super Square 1: http://www.amazon.com/QJ-Super-Square-Puzzle-Cube/dp/B003OU480Q/ref=pd_sim_t_19
Diansheng Axis: http://www.amazon.com/Diansheng-Fluctuation-Angle-Shape-Puzzle/dp/B00FX0IXYW/ref=sr_1_2?s=toys-and-games&ie=UTF8&qid=1389580676&sr=1-2&keywords=axis+cube
Just to name a few