You can get a Centric remanufactured caliper for $150 loaded with Possi Quite pads. These are the same exact calipers but they do not have the Brembo sticker on them and they actualy have better pistons (hollow) in them vs the factory ones (solid).
You will have to pay a core charge though and I'm not sure how much they will want for that. It will still be less than the 460 the dealer wants though.
Another note is that ALL SRT8 Brembo calipers are the same from 06-10 only the colors are different. So Ebay is a great place to search.
Here is the Centric ones.
Here is a pic of the factory ones with the solid pistons that flake.
So for all those out there, check your factory Brembo pistons! Front only rears don't seem to have this issue.
Hope this helps.