Emdkay.net supposedly does top notch work, some say even better than Mamemarquees (as far as color), and, it's definitely cheaper. They don't do CP's though, I'm actually splitting order because of it, Marquee to Emdkay, CP to Mamemarquees.
Both guys have been absolutely great though, no complaints. We should all keep in mind that we're all in this for fun and not for "business," these guys are doing us a favor by catering to us, when other printers charge a lot more for this.
In other news... if I didn't already invest and cut my Lexan overlay for my CP, I would totally have done this... I realize at the studio where I work, there's this whole print shop and they can do personal jobs for payment. I asked about printing options (in case Mamemarqees was too busy) and they said they could make me a reverse-printed piece of Plexi for my CP, for like $90... which I know if more than using an underlay but damn, that would have been sick.