build your own set, much better than the sets imho. all you need to start with is
the tool height setting block: http://www.littlemachineshop.com/pro...gory=209730719
and the collet: http://www.littlemachineshop.com/pro...gory=209730719
add chucks (with adapters), ER tool holders, end mill holders, etc depending on what you need: http://www.littlemachineshop.com/pro...gory=209730719
I like the idea of having extras, so you can have things like center drills or edge finders that never get taken apart and are always ready to use.
FS: Complete Z-Axis Assembly with THK RSR15WM slide, leadscrew, stepper mount. PM for more info.