Brakes on 2000 LS

I am going to try and change my front brakes on my 2000 ls. I had looked at the calipers once before and they are the screw in calipers so you can't use a c-clamp like you can on most other vehicles. Does anyone know where I can get the tool to screw in the calipers so that I can change the brakes myself. I had tried autozone and advance but the universal tool they sell will not fit the ls.
Thanks
Chieff

NAPA has one. It's like $20. I bought a universal tool from AutoZone and modified the nubs until it fit the piston grooves.

Chieff,

How did the brake job go, run into any problems? I have a 2001 LS that I'm getting ready to do the front brakes on. I went to Napa today and bought the tool for $13, hope it works. Do I need to do anything with the ABS (unplug or disconnect..) brake sysem? Am I going to need any other tools that you came across?
Thanks for your help.

Scott