star bit or torx screw porsche just makes it so difficult

[Bmod986]

So I got my new caliper bolts and guess what, they use the star bit or the torx screw bit of 10mm. So now I am have to find a 10mm bit and most hardware stores carry the smaller sizes. Any suggestions where I could get a good set for cheep and decent quality. checked harbor fright, sears, and some other places.

Also why would porsche change its design from the hex bolt to the star bit? Just makes everything harder.