Helltech 0 Junior Poster

I have two harddrives, one running XP Professional, and one running Vista Ultimate.

Does anyone know where I can find a cheap external multiposition switch to turn one on or off (the switch would be external of cource) , so I don't have to go to the BIOS everytime I start the computer. I know my friends dad had one but he doesn't live here anymore.

Please and thanks.