Another excellent guide is Simon Elias--Spanish, speaks excellent English,very friendly, patient, and encouraging
I don't know his private rates since we booked a group rate through the Compagnie des Guides. I'm not sure he's an official CDG guide since he wasn't wearing a CDG uniform--he may have been helping out on a sold out day. I've skied with 5 or 6 Cham guides--he's the first I'd recommend.
Another excellent guide is Pierre Labbre. He was with the CDG when we skied with him 4 years ago.
He has a web site: http://www.pierrelabbre-guide.com/ in French (but his English is good.) Interesting climbing resume if you google him.