I like part of Ruth Goldstein's, one of the park conservancy founders, response in that article. While I am fairly confident that asking and trying to go through legitimate channels to get the bust put up would not of worked, what she said makes me think there are at least people who would consider it, although probably not high enough in power structures to actually get it done.

“The park is such a symbol of American liberty; that’s what it’s all about, the founding principals of it,” she said. “It (the bust) is almost appropriate but inappropriate to do it (put up illegally).”