Well, it took a while and some googling to find it, but here, from justplaincher.com (a Cher fan site) is the Herman quote about Mame (from October 26, 2004):
"It's official; Cher and Streisand are both 'out' as far as the new movie incarnation of MAME is concerned. Cher was to star, Streisand was to executive produce with her production team.
"It's up for grabs" says creator Jerry Herman referring to a movie redux of his musical MAME. Herman was questioned about MAME this weekend, while visiting East Haddam (CT) at the Goodspeed Opera House where a revival of Herman's "MACK and MABEL" is under way.
According to Herman, he took one look at the early version of the script under Streisand's supervision and nixed the idea. He complains that Streisand took some liberties with the big chorus numbers, and changed them into solo versions for "Mame" (Cher) to sing. Says Herman, "She took 'It's Today' and turned it into a solo! A solo! It's a party song, and she turns it into a solo? I don't want to get into it."
Herman was more interested in talking about his new choice to play Mame. "What do you think about Catherine Zeta Jones as MAME?" he asked reporters. "She's funny and she's a real musical lady. I think it would be phenomenal". "
Now, personally, I think Catherine Zeta-Jones is all wrong (and a decade too young) for the part, but, regardless, the point is Cher is OUT as Mame.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney