Collet Too lholder for small carbide tools?

After a rather bumpy start with my Taig CNC, I'm finally back on track!

I'm using a Taig with MEDW 4 axis controller and Kress High Speed Spindle. I'm machining some buffer beams and running a drill cycle followed by profiling the parts with a slot drill.

As I have to set the Z0 each time, I was wondering about using a small tool holder in the collet, something similar to this but to hold 3.175mm shank drills and slot drills.

http://img691.imageshack.us/img691/8...img2756342.jpg

Does anyone know if these are available? Straight 8mm shank, bored to 1/8" or 3mm, with a small grub screw to hold the cutter, a shoulder on the holder to ensure it repeatedly locates in the collect.