I'd been looking for some replacement bits (specifically a 2mm flat and T6 Torx) for my Cybertool and found this set on Amazon for just £6 with free postage:
http://www.amazon.co.uk/gp/product/B009VYB8HA?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s01Lots of bits (hex, torx, phillips, flat, a few security types) and a fairly decent driver handle:

The bits are chrome plated, single ended and held in place with a magnet in the driver handle.
This is the one I was after:

Fits well in the Cybertool bit driver, though isn't retained at all:

I've ordered some 3mm diameter x 1mm thick neodymium magnets to glue in the bottom of the bit driver to keep the bits in place.
The quality may be questionable though, this is the 1mm hex bit:

Looks like they missed the operation to machine the hex - it's a plain diameter.

Overall, it seems a pretty good set for a good price. We'll see how they hold up in use.