This may sound silly, but you might want to try eBay. I was having the same problem with getting good rotors for a realistic price on my old 2001 Trooper. I finally went to ebay and found a whole brand new brake kit with new rotors and pads (and they were NOT junk) for less than just one rotor at the dealership. They might have even been factory parts.
There was a place that specialized in them and had very good prices and excellent quality stuff. If you are doing your own work, then I see no need to get the overpriced stuff from the dealer or an installer.