Powerswitch thru USB or Parallel port

[EMPiRE]

I am looking for a cheap solution to have a (physical) switch which is controlled thru a USB or Parallel port (on WinXP/2003)

I want to switch off an external USB harddrive, which is connected to a remote server, so it is not running 24 hours a day.

You should think that something already exists but I have could not find any cheap solution

I know there is a 8-port parallel switch @ Conrad which could work but I only need one single switch and the included software only works on win9x?!
The APC PowerSwitch, which has a web-frontend, is just too expensive for this sort of thing!

Things like stopping/restarting the HD motor which software just do not work