I found the CMU Sphinx's whole acoustic model for Italian.
The *.tar.gz contains the pronunciation dictionary. And it is, unfortunately, terrible.
For example, according to it "zucchero" should be pronounced as if written "zucero",
digraphs like "ll" aren't referenced as one phoneme and some accents are missing, and so on.
You can download the model at:
Then you find the *.dic file within the archive.
But there must exist some dictionary that can be turned into similarly mapped file.
Does anybody know about it? A PDF or something!