Size of Iginition switch screws

Trying to change the ignition switch on my son 96 2.2 Cavalier. The switch is held in place by two small aluminum male star type torque screws. I have check all the local auto stores in my area and nobody caries a female torque star socket small enough to fit. Does anybody know where I can find one of these things or how I can remove these screws short of vice grips?

Finally found the right socket at Northern Tool. They sell a 9 pc star socket set for $4.99 that contained the right size socket ( E5). It only took me 10 minutes or so to change the switch, but two days to find the right socket!

yea i did that on my 99 it SUCKS! i changed them to socket heads.