Dorman also has Phillips head replacements. I think you get 8 screws for $6 or so. I used them on mine when the OE torx screws got mangled. Per the service manual, they are supposed to be replaced after removal, but as the guys indicated above, they just retain the rotors when the wheel is removed.
I put a moderate amount of antisieze on my screws and tighten them just enough to keep the rotor properly seated. The wheels/lugs keep things in place otherwise.
P.S. Aren't you proud of me, Z?! Not one mention of the 3-letter n-word!

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